Decimals

Problem 1101

$\left(7.9 \times 10^{7}\right)-\left(3.3 \times 10^{7}\right)$

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Problem 1102

Put these numbers in order from least to greatest. 1.94 $\frac{5}{8}$ 0.33
Submit

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Problem 1103

What is Mark's height if the boys are 152.0 cm, 150.75 cm, 149.5 cm, and 149.25 cm, with Josh being the shortest?

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Problem 1104

Evaluate $a+b+c d$ for $a=\frac{7}{8}, b=-\frac{7}{16}, c=0.8, d=\frac{1}{4}$ . Write your answer as a fraction.

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Problem 1105

Four boys have heights of $152.0 \mathrm{~cm}, 150.75 \mathrm{~cm}, 149.5 \mathrm{~cm}$ , and $149.25 \mathrm{~cm}$ . Find Mark's height.

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Problem 1106

What three numbers between 0.68 and 0.69 could Mario have written? Choose the correct option.

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Problem 1107

Match decimals from Set A to Set B: 0.48, 1.20, 1.09, 0.046 with 1.200, 1.090, 0.046, 0.480.

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Problem 1108

What three numbers did Mario write between 0.68 and 0.69? Choose the correct set: A. $0.686,0.693,0.694$ B. $0.693,0.694,0.698$ C. $0.682,0.686,0.688$ D. $0.682,0.688,0.694$

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Problem 1109

What is the result of dividing 213 by 20? Calculate $213 \div 20$ .

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Problem 1110

Convert $0.386 \mathrm{~g}$ to milligrams using the metric system.

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Problem 1111

Calculate the product: $0.2 \times 0.8=$

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Problem 1112

Calculate $0.085631 \times 1.32$ and round the result to the correct number of significant figures.

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Problem 1113

Solve: $26.04 \div -6.2$

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Problem 1114

Convert 23.2 kilometers to centimeters using the conversion factor: 1 km = 100,000 cm.

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Problem 1115

Calculate the total mass of a beaker (35.4478 g ± 0.0002 g) and two metals (3.1162 g ± 0.0002 g, 4.6617 g ± 0.0002 g) with error.

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Problem 1116

Calculate the mass of water added to a beaker that weighed $26.2411 \mathrm{~g} \pm 0.0002 \mathrm{~g}$ and now weighs $33.1932 \mathrm{~g} \pm 0.0002 \mathrm{~g}$ .

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Problem 1117

Convert $9.87 \times 10^{-30} \mathrm{ml}$ to $\mathrm{Tl}$ .

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Problem 1118

Alisha buys 1.5 kg onions, 3.6 kg potatoes, 0.6 kg radish, and 1.2 kg apples. Calculate her total cost.

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Problem 1119

What is the decimal equivalent of $\frac{16}{3}$ ? A. $5.\overline{3}$ B. 5.3 C. 16.3 D. 0.1875

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Problem 1120

Calculate the total cost for 3 meals at \$8.99, 2 sodas at \$1.50, and 1 tea at \$1.25. Evaluate the expression.

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Problem 1121

Aisha bought 6 notebooks at \$0.39, 2 pencil packs at \$0.79, and a binder at \$1.99. Find the total spent.

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Problem 1122

A surveying chain with 1000 links measures $0.0333 \mathrm{~km}$ . Find the length of one link in cm as a decimal.

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Problem 1123

Calculate the sum: $4.520 + 18.03 + 0.2 = ?$

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Problem 1124

Organize these transactions by date, then calculate your balance after each:
1. Apr 29: balance \$237.47
2. Apr 29: write check \#115 for \$18.00
3. Apr 30: paycheck \$62.75
4. May 4: deposit check from grandma \$25.00
5. May 5: ATM withdrawal \$20 + \$3 fee
6. May 12: write check \#116 for \$51.16
7. May 10: receive \$20 from sister
8. May 12: ATM withdrawal \$525
9. May 16: deposit paycheck \$265.65
10. May 12: deposit birthday check \$35 (received on May 12, deposited on May 17)

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Problem 1125

Convert the number $2.58 \times 10^{-3}$ to decimal notation.

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Problem 1126

What is the absolute value of -5.1? Calculate $|-5.1|$ .

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Problem 1127

Convert 0.000006 and 300 to scientific notation, then find and express the quotient in scientific notation.
0.000006 =
300 =
$\frac{0.000006}{300}=$

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Problem 1128

Calculate the product of $(3) \cdot (6.12) \cdot 0.3$ .

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Problem 1129

Royce started with \$ 171.26. After deposits of \$ 60.76, \$ 29.79, \$ 89.31 and withdrawals of \$ 14.82, \$ 46.79, \$ 55.52, how much does he have now?

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Problem 1130

Cynthia buys a heater for \$181.25. She pays with 2 \$50 bills, 7 \$10 bills, and 12 \$1 bills. What's her change?

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Problem 1131

Cynthia buys a heater for \$181.25, pays with 2 \$50, 7 \$10, and 12 \$1 bills. How much change does she get?

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Problem 1132

Kara donates \$ 18.18 monthly for 12 months. Total donation after 12 months? A. \$ 217.06 B. \$ 217.16 C. \$ 218.06 D. \$ 218.16

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Problem 1133

Convert $6.7 \times 10^{1}$ from scientific notation to standard form.

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Problem 1134

Simplify the scientific notation 6.7 x 10^{1}.

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Problem 1135

Calculate $6.7 \times 10^{1}$ .

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Problem 1136

Calculate the value of $1.6 \times 10^{3}$ .

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Problem 1137

Calculate the value of $2.91 \times 10^{5}$ .

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Problem 1138

Calculate the value of $3.35 \times 10^{-1}$ .

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Problem 1139

Calculate the value of $1.49 \times 10^{-7}$ .

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Problem 1140

Find the significant digits in the measurement $52.9 \mathrm{~km}$ .

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Problem 1141

Find the number of significant digits in the measurement $70.09 \, \text{in}$ .

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Problem 1142

Find the significant digits in the measurement $23.0 \mathrm{~g}$ .

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Problem 1143

Calculate the total cost for 8 items at \$25 each plus a \$17.50 fee. Total \$ (\#\#\#.\#)

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Problem 1144

Find the final diameter of a cylinder initially $3.63^{\prime \prime}$ after machining it $0.030^{\prime \prime}$ oversize.

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Problem 1145

What is the total thickness of spacer shims measuring $0.050 \mathrm{~mm}$ , $0.003 \mathrm{~mm}$ , and $0.010 \mathrm{~mm}$ when stacked?

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Problem 1146

Calculate the usable tread depth of a tire if new depth is $9.94 \mathrm{~mm}$ and worn out depth is $1.59 \mathrm{~mm}$ .

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Problem 1147

7.65 m equals how many cm?

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Problem 1148

Mr. Michaels has 40 m of wire. After wiring 16 lamps (0.45 m each), 12 wall lights (0.7 m each), and 1 floor lamp (2.6 m), how much is left? A) 7.2 m B) 18.2 m C) 21.8 m D) 15.6 m

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Problem 1149

Convert 10.7 m to cm using 1 m = 100 cm. What is $10.7 \times 100$ ?

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Problem 1150

Convert 10.7 meters to centimeters using the conversion factor: 1 meter = 100 centimeters.

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Problem 1151

Convert 1.212 m to cm. Remember, 1 m = 100 cm.

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Problem 1152

1.6 m equals how many cm?

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Problem 1153

Add the following decimals to 1 decimal place:
1) $28.2 + 93.5$ 2) $94.6 + 37.2$ 3) $82.6 + 23.6$ 4) $50.9 + 39.4$ 5) $128.2 + 340$ 6) $139.7 + 738.2$ 7) $382.6 + 126.5$ 8) $462.8 + 731.2$ 9) $68.4 + 29.8 + 55.3$ 10) $80.2 + 52.8 + 13$ 11) $385.6 + 297.9$ 12) $363 + 80.5$ 13) $25.3 + 25.8 + 38.8$

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Problem 1154

Calculate the sum of 72.8 and 37.4. What is the result?

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Problem 1155

Calculate the sum of 48.7 and 39.8. What is $48.7 + 39.8$ ?

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Problem 1156

Calculate the sum of $139.7$ and $382.6$ .

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Problem 1157

2) $10.8+(-4.73)$

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Problem 1158

$2.96+0.04=$

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Problem 1159

Tue Dec 3 a cdn.assess.prod.mheducation.com
This question has two parts. First, answer Part A. Then, answer Part B. Part A Choose the correct answer. A sandwich shop uses 0.14 pound of tomato on each sandwich. How much tomato will the shop need sandwiches? Look at the decimal grids. Which represents the problem? A) $\square$ B) $\square$ C) \begin{tabular}{|l|l|l|l|} \hline -I & & & \\ \hline-1 & & & \\ \hline \\ \hline & & & \\ \hline & & & \\ \hline & & & \\ \hline & & & \\ \hline & & & \\ \hline \end{tabular}
Part B Enter the answer. How much tomato will the shop need to make the 6 sandwiches?. pound(s) of tomato

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Problem 1160

Early Finisher Challenge Which number forms are equivalent to 0.28 ? Select all that apply. A. $28 \%$ B. $\frac{21}{80}$ C. $\frac{28}{100}$ D. $\frac{14}{50}$ E. 28 F. $\frac{7}{25}$

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Problem 1161

Find $-3.75+1.5$
What is the sum? $-3.75+1.5=$

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Problem 1162

Moshliw weok (1) $1.52 \times 2.5$

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Problem 1163

1) Tarik sells cups of lemonade. Today his expenses are $-\$ 6.80$ and his sales are $\$ 4.40$ . Does Tarik have more or less money than he did at the start of the day?
Find the sum. $-6.80+4.40=$ $\square$

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Problem 1164

10. Find the quotient of the expression $(-864.3) \div(-3)$
Type a response Show Your Work

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Problem 1165

$30.5 \times 10.4$

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Problem 1166

Divide: $1.98 \div 0.09$
A 2.2 (B) 22
C 220 D 0.22

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Problem 1167

During a study that lasted 47 days, one chicken was fed 5.17 kg of chicken feed. What was the daily rate at which the chicken was fed?
A 0.108 kg per day B 0.109 kg per day C 0.110 kg per day D 0.111 kg per day

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Problem 1168

BI
Evaluate the following. $1.5^{2} \div 5+0.8(61.7)$

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Problem 1169

Given that $0 . \dot{6} \dot{3}=\frac{7}{11}$ , what is $0.0 \dot{6} \dot{3}$ as a fraction in its simplest form?

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Problem 1170

The movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer Which of the following sentences is true? Use the number line to help you decide. 6.8 is greater than 6.6 6.3 is less than 6.0 . 6.4 is greater than 6.6 . 6.4 is less than 6.2 .

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Problem 1171

4. Simplify the expression. $|28.1-7.03|-|3.5 \cdot 4.1|+|-9|$

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Problem 1172

Amanda filled her gas tank three times last week. Here are the amounts of gas she bought (in gallons). $8.62,14.4,9$
What is the total amount of gas Amanda bought last week? $\square$ gallons

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Problem 1173

Write the following number in standard decimal form. four hundredths

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Problem 1174

7) $\frac{7.1 \times 10^{6}}{8.2 \times 10^{1}}$

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Problem 1175

Calculate the kinetic energy of a $544 . \mathrm{kg}$ boat moving at a speed of $13.2 \frac{\mathrm{~m}}{\mathrm{~s}}$ . Round your answer to 3 significant digits.

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Problem 1176

17) $9.3 \times 10^{-8}-8.3 \times 10^{-5}$ 19) $\left(2.3 \times 10^{2}\right)\left(5 \times 10^{1}\right)$ 21) $\left(2.1 \times 10^{-4}\right)\left(3.05 \times 10^{1}\right)$ 23) $\frac{6.3 \times 10^{-5}}{7 \times 10^{4}}$ 25) $\frac{8.88 \times 10^{-1}}{2 \times 10^{6}}$

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Problem 1177

Calculate the sum of 838.0 and 542.7. What is the result?

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Problem 1178

Bailey downloaded 7 TV show episodes at \$1.75 each. What is her total cost?

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Problem 1179

Check if these products are less than 25: $10.4 \times 2.3$ , $0.8 \times 31$ , $2.86 \times 11.4$ , $5.6 \times 4.50$ .

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Problem 1180

Calculate $1.75 \times 7$ .

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Problem 1181

Divide $78.32$ by $2$ .

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Problem 1182

Divide 66.15 by 5: $66.15 \div 5$

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Problem 1183

Divide 188.4 by 60. What is the result?

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Problem 1184

If Charles runs 100 meters in 23.4 seconds, how long for 400 meters? A) 9,360 s B) 2,340 s C) 423.4 s D) 93.6 s

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Problem 1185

If Charles runs 100 meters in 23.4 seconds, how long for 40 meters? A) 9,360s B) 2,340s C) 423.4s D) 93.6s

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Problem 1186

Calculate $59.6 \div 8$ .

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Problem 1187

Convert 7.5 cm to mm. What is the value in mm?

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Problem 1188

Divide 7.7 by 700. How many decimal places does the result have? Explain using place-value reasoning.

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Problem 1189

Show why $1.016 \div 4.064 \neq 0.025$ without performing the division.

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Problem 1190

Divide 5.372 by 2 using long division.

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Problem 1191

Solve using the standard algorithm: $0.576 \div 4 =$

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Problem 1192

1. Convert $0.8 \mathrm{~km}$ to $\mathrm{cm}$ .

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Problem 1193

Sara ordered 2 eggs, 1 bacon, and 1 juice. With a \$0.48 tax, how much change from her \$10 bill?

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Problem 1194

Convert 232 oz to lb and round your answer to 3 decimal places. $232 \mathrm{oz} =$ $\mathrm{lb}$

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Problem 1195

Calculate $\frac{16.2}{40} \cdot 360^{\circ}$ .

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Problem 1196

Convert 11 feet to meters using $1 \mathrm{ft}=0.305 \mathrm{~m}$ or $1 \mathrm{~m}=3.281 \mathrm{ft}$ . Round to the nearest hundredth.

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Problem 1197

Compare these numbers using >, <, or =: 16.45, 0.83, 95.045, 419.10.

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Problem 1198

A 129-page report needs 16 copies. Calculate the paper cost for printing using reams (500 pages) at \$3.72 each. Round to the nearest cent.

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Problem 1199

Compare these numbers using $<$ , $>$ , or $=$ : 419.10, 5.8, 36.009, 104.12, 0.158, 703.005, 5.8, 40, 104.002, 0.58, 703.05.

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Problem 1200

Arrange the numbers in increasing order: 8.08, 8.081, 8.09, 8.008 and 14.204, 14.200, 14.240, 14.210.

See Solution

1 ...9 10 11 12 13 14 15 ...17

Decimals

Problem 1101

(7.9×107)−(3.3×107)\left(7.9 \times 10^{7}\right)-\left(3.3 \times 10^{7}\right)(7.9×107)−(3.3×107)

Problem 1102

Put these numbers in order from least to greatest. 1.94 58\frac{5}{8}85​ 0.33Submit

Problem 1103

What is Mark's height if the boys are 152.0 cm, 150.75 cm, 149.5 cm, and 149.25 cm, with Josh being the shortest?

Problem 1104

Evaluate a+b+cda+b+c da+b+cd for a=78,b=−716,c=0.8,d=14a=\frac{7}{8}, b=-\frac{7}{16}, c=0.8, d=\frac{1}{4}a=87​,b=−167​,c=0.8,d=41​. Write your answer as a fraction.

Problem 1105

Four boys have heights of 152.0 cm,150.75 cm,149.5 cm152.0 \mathrm{~cm}, 150.75 \mathrm{~cm}, 149.5 \mathrm{~cm}152.0 cm,150.75 cm,149.5 cm, and 149.25 cm149.25 \mathrm{~cm}149.25 cm. Find Mark's height.

Problem 1106

What three numbers between 0.68 and 0.69 could Mario have written? Choose the correct option.

Problem 1107

Match decimals from Set A to Set B: 0.48, 1.20, 1.09, 0.046 with 1.200, 1.090, 0.046, 0.480.

Problem 1108

Problem 1109

What is the result of dividing 213 by 20? Calculate 213÷20213 \div 20213÷20.

Problem 1110

Convert 0.386 g0.386 \mathrm{~g}0.386 g to milligrams using the metric system.

Problem 1111

Calculate the product: 0.2×0.8=0.2 \times 0.8=0.2×0.8=

Problem 1112

Calculate 0.085631×1.320.085631 \times 1.320.085631×1.32 and round the result to the correct number of significant figures.

Problem 1113

Solve: 26.04÷−6.226.04 \div -6.226.04÷−6.2

Problem 1114

Convert 23.2 kilometers to centimeters using the conversion factor: 1 km = 100,000 cm.

Problem 1115

Calculate the total mass of a beaker (35.4478 g ± 0.0002 g) and two metals (3.1162 g ± 0.0002 g, 4.6617 g ± 0.0002 g) with error.

Problem 1116

Calculate the mass of water added to a beaker that weighed 26.2411 g±0.0002 g26.2411 \mathrm{~g} \pm 0.0002 \mathrm{~g}26.2411 g±0.0002 g and now weighs 33.1932 g±0.0002 g33.1932 \mathrm{~g} \pm 0.0002 \mathrm{~g}33.1932 g±0.0002 g.

Problem 1117

Convert 9.87×10−30ml9.87 \times 10^{-30} \mathrm{ml}9.87×10−30ml to Tl\mathrm{Tl}Tl.

Problem 1118

Alisha buys 1.5 kg onions, 3.6 kg potatoes, 0.6 kg radish, and 1.2 kg apples. Calculate her total cost.

Problem 1119

What is the decimal equivalent of 163\frac{16}{3}316​? A. 5.3‾5.\overline{3}5.3 B. 5.3 C. 16.3 D. 0.1875

Problem 1120

Calculate the total cost for 3 meals at \$8.99, 2 sodas at \$1.50, and 1 tea at \$1.25. Evaluate the expression.

Problem 1121

Aisha bought 6 notebooks at \$0.39, 2 pencil packs at \$0.79, and a binder at \$1.99. Find the total spent.

Problem 1122

A surveying chain with 1000 links measures 0.0333 km0.0333 \mathrm{~km}0.0333 km. Find the length of one link in cm as a decimal.

Problem 1123

Calculate the sum: 4.520+18.03+0.2=?4.520 + 18.03 + 0.2 = ?4.520+18.03+0.2=?

Problem 1124

Problem 1125

Convert the number 2.58×10−32.58 \times 10^{-3}2.58×10−3 to decimal notation.

Problem 1126

What is the absolute value of -5.1? Calculate ∣−5.1∣|-5.1|∣−5.1∣.

Problem 1127

Convert 0.000006 and 300 to scientific notation, then find and express the quotient in scientific notation. 0.000006 = 300 = 0.000006300= \frac{0.000006}{300}= 3000.000006​=

Problem 1128

Calculate the product of (3)⋅(6.12)⋅0.3(3) \cdot (6.12) \cdot 0.3(3)⋅(6.12)⋅0.3.

Problem 1129

Royce started with \$ 171.26. After deposits of \$ 60.76, \$ 29.79, \$ 89.31 and withdrawals of \$ 14.82, \$ 46.79, \$ 55.52, how much does he have now?

Problem 1130

Cynthia buys a heater for \$181.25. She pays with 2 \$50 bills, 7 \$10 bills, and 12 \$1 bills. What's her change?

Problem 1131

Cynthia buys a heater for \$181.25, pays with 2 \$50, 7 \$10, and 12 \$1 bills. How much change does she get?

Problem 1132

Kara donates \$ 18.18 monthly for 12 months. Total donation after 12 months? A. \$ 217.06 B. \$ 217.16 C. \$ 218.06 D. \$ 218.16

Problem 1133

Convert 6.7×1016.7 \times 10^{1}6.7×101 from scientific notation to standard form.

Problem 1134

Simplify the scientific notation 6.7 x 10^{1}.

Problem 1135

Calculate 6.7×1016.7 \times 10^{1}6.7×101.

Problem 1136

Calculate the value of 1.6×1031.6 \times 10^{3}1.6×103.

Problem 1137

Calculate the value of 2.91×1052.91 \times 10^{5}2.91×105.

Problem 1138

Calculate the value of 3.35×10−13.35 \times 10^{-1}3.35×10−1.

Problem 1139

Calculate the value of 1.49×10−71.49 \times 10^{-7}1.49×10−7.

Problem 1140

Find the significant digits in the measurement 52.9 km52.9 \mathrm{~km}52.9 km.

Problem 1141

$\left(7.9 \times 10^{7}\right)-\left(3.3 \times 10^{7}\right)$

Put these numbers in order from least to greatest. 1.94 $\frac{5}{8}$ 0.33
Submit

Evaluate $a+b+c d$ for $a=\frac{7}{8}, b=-\frac{7}{16}, c=0.8, d=\frac{1}{4}$ . Write your answer as a fraction.

Four boys have heights of $152.0 \mathrm{~cm}, 150.75 \mathrm{~cm}, 149.5 \mathrm{~cm}$ , and $149.25 \mathrm{~cm}$ . Find Mark's height.

What is the result of dividing 213 by 20? Calculate $213 \div 20$ .

Convert $0.386 \mathrm{~g}$ to milligrams using the metric system.

Calculate the product: $0.2 \times 0.8=$

Calculate $0.085631 \times 1.32$ and round the result to the correct number of significant figures.

Solve: $26.04 \div -6.2$

Calculate the mass of water added to a beaker that weighed $26.2411 \mathrm{~g} \pm 0.0002 \mathrm{~g}$ and now weighs $33.1932 \mathrm{~g} \pm 0.0002 \mathrm{~g}$ .

Convert $9.87 \times 10^{-30} \mathrm{ml}$ to $\mathrm{Tl}$ .

What is the decimal equivalent of $\frac{16}{3}$ ? A. $5.\overline{3}$ B. 5.3 C. 16.3 D. 0.1875

A surveying chain with 1000 links measures $0.0333 \mathrm{~km}$ . Find the length of one link in cm as a decimal.

Calculate the sum: $4.520 + 18.03 + 0.2 = ?$

Convert the number $2.58 \times 10^{-3}$ to decimal notation.

What is the absolute value of -5.1? Calculate $|-5.1|$ .

Convert 0.000006 and 300 to scientific notation, then find and express the quotient in scientific notation.
0.000006 =
300 =
$\frac{0.000006}{300}=$

Calculate the product of $(3) \cdot (6.12) \cdot 0.3$ .

Convert $6.7 \times 10^{1}$ from scientific notation to standard form.

Calculate $6.7 \times 10^{1}$ .

Calculate the value of $1.6 \times 10^{3}$ .

Calculate the value of $2.91 \times 10^{5}$ .

Calculate the value of $3.35 \times 10^{-1}$ .

Calculate the value of $1.49 \times 10^{-7}$ .

Find the significant digits in the measurement $52.9 \mathrm{~km}$ .

Find the number of significant digits in the measurement $70.09 \, \text{in}$ .

Find the significant digits in the measurement $23.0 \mathrm{~g}$ .

Find the final diameter of a cylinder initially $3.63^{\prime \prime}$ after machining it $0.030^{\prime \prime}$ oversize.

What is the total thickness of spacer shims measuring $0.050 \mathrm{~mm}$ , $0.003 \mathrm{~mm}$ , and $0.010 \mathrm{~mm}$ when stacked?

Calculate the usable tread depth of a tire if new depth is $9.94 \mathrm{~mm}$ and worn out depth is $1.59 \mathrm{~mm}$ .

Convert 10.7 m to cm using 1 m = 100 cm. What is $10.7 \times 100$ ?

Calculate the sum of 48.7 and 39.8. What is $48.7 + 39.8$ ?

Calculate the sum of $139.7$ and $382.6$ .

2) $10.8+(-4.73)$

$2.96+0.04=$

Early Finisher Challenge Which number forms are equivalent to 0.28 ? Select all that apply. A. $28 \%$ B. $\frac{21}{80}$ C. $\frac{28}{100}$ D. $\frac{14}{50}$ E. 28 F. $\frac{7}{25}$

Find $-3.75+1.5$
What is the sum? $-3.75+1.5=$

Moshliw weok (1) $1.52 \times 2.5$

1) Tarik sells cups of lemonade. Today his expenses are $-\$ 6.80$ and his sales are $\$ 4.40$ . Does Tarik have more or less money than he did at the start of the day?
Find the sum. $-6.80+4.40=$ $\square$

10. Find the quotient of the expression $(-864.3) \div(-3)$
Type a response Show Your Work

$30.5 \times 10.4$

Divide: $1.98 \div 0.09$
A 2.2 (B) 22
C 220 D 0.22

During a study that lasted 47 days, one chicken was fed 5.17 kg of chicken feed. What was the daily rate at which the chicken was fed?
A 0.108 kg per day B 0.109 kg per day C 0.110 kg per day D 0.111 kg per day

BI
Evaluate the following. $1.5^{2} \div 5+0.8(61.7)$

Given that $0 . \dot{6} \dot{3}=\frac{7}{11}$ , what is $0.0 \dot{6} \dot{3}$ as a fraction in its simplest form?

4. Simplify the expression. $|28.1-7.03|-|3.5 \cdot 4.1|+|-9|$

Amanda filled her gas tank three times last week. Here are the amounts of gas she bought (in gallons). $8.62,14.4,9$
What is the total amount of gas Amanda bought last week? $\square$ gallons

7) $\frac{7.1 \times 10^{6}}{8.2 \times 10^{1}}$