Multiplying And Dividing Using Significant Figures
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- 1.
7.6 x 21.9 = ?
- A.
166.4
- B.
166
- C.
170
- D.
160
Correct Answer
C. 170Explanation
The product of 7.6 and 21.9 is 166.44, which is closest to 170.Rate this question:
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- 2.
38 / 7 = ?
- A.
5.429
- B.
5.43
- C.
5.4
- D.
5
Correct Answer
D. 5Explanation
The correct answer is 5 because when you divide 38 by 7, the quotient is 5 with a remainder of 3. Since the question asks for the quotient, the answer is 5.Rate this question:
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- 3.
2.15 x 3.1 x 100 = ?
- A.
7
- B.
680.5
- C.
670.5
- D.
666.5
Correct Answer
D. 666.5Explanation
The given expression can be simplified by multiplying the numbers together. 2.15 multiplied by 3.1 gives us 6.665, and when we multiply this by 100, we get 666.5. Rounding this to the nearest whole number gives us 666.5.Rate this question:
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- 4.
5.0009 x 0.06 = ?
- A.
0.30005
- B.
0.3001
- C.
0.30
- D.
0.3
Correct Answer
D. 0.3Explanation
The product of 5.0009 and 0.06 is 0.300054, which can be approximated to 0.3.Rate this question:
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- 5.
500 009 / 17.000 = ?
- A.
29412
- B.
29410
- C.
29400
- D.
29000
Correct Answer
A. 29412Explanation
To find the result of the division, we divide 500,009 by 17,000. The quotient is 29 and the remainder is 4. Since the remainder is less than half of the divisor (8,500), we round down the quotient to 29. Therefore, the correct answer is 29,412.Rate this question:
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- 6.
39.3 x 0.804 = ?
- A.
31.6
- B.
31.5
- C.
31.597
- D.
32.0
Correct Answer
A. 31.6Explanation
The given question asks for the product of 39.3 and 0.804. To find the answer, we multiply these two numbers together. The result is 31.5972, but since the question asks for the answer rounded to one decimal place, we round the answer to the nearest tenth, which gives us 31.6.Rate this question:
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- 7.
45.20 x 0.0071 =45.20 x 045.20 x 0.0071 = ?
- A.
0.321
- B.
0.32
- C.
0.3209
- D.
0.3
Correct Answer
B. 0.32Explanation
The given equation can be simplified by multiplying 45.20 and 0.0071 first, which equals 0.32152. Then, multiplying this result by 045.20 will give the final answer. However, since 045.20 is the same as 45.20, the equation can be further simplified to 45.20 multiplied by 0.32152. Evaluating this multiplication gives the answer of 0.32.Rate this question:
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- 8.
497.7 / 3.0 = ?
- A.
165.9
- B.
172.3
- C.
141.8
- D.
152.7
Correct Answer
A. 165.9Explanation
To calculate 68 divided by 0.00001, recognize that dividing by a decimal is equivalent to multiplying by its reciprocal. The reciprocal of 0.00001 is 100,000. Thus, the expression becomes 68 multiplied by 100,000. This multiplication results in 6,800,000. Therefore, 68 divided by 0.00001 equals 6,800,000.Rate this question:
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- 9.
43,000 x 0.00546 = ?
- A.
234.78
- B.
234.9
- C.
235
- D.
230
Correct Answer
D. 230Explanation
The given question requires multiplying 43,000 by 0.00546. When this calculation is performed, the result is 234.78. However, since the answer choices are rounded to the nearest whole number, the correct answer is 230, which is the closest whole number to 234.78.Rate this question:
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- 10.
315 / 10 = ?
- A.
31.5
- B.
31
- C.
32
- D.
30
Correct Answer
A. 31.5Explanation
Dividing 315 by 10 is straightforward. Imagine 315.0 with a decimal point. To divide by 10, shift the decimal one place to the left. This gives you 31.5. Essentially, you're reducing the value of 315 by one-tenth, resulting in 31.5.Rate this question:
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Current Version
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Oct 15, 2024Quiz Edited by
ProProfs Editorial Team -
Apr 26, 2017Quiz Created by
Jasondickerson2
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