Estimating a Product of Whole Numbers Online Quiz



Following quiz provides Multiple Choice Questions (MCQs) related to Estimating a Product of Whole Numbers. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Q 1 - Estimate the product 8541 × 653 by first rounding each number so that it has only one non-zero digit

A - 6300000

B - 6500000

C - 6000000

D - 6600000

Answer : A

Explanation

Step 1:

Rounding 8541 so that it has only one non-zero digit is rounding it to nearest thousand.

8541 rounds to nearest thousand as 9000 as hundreds digit is 5.

Step 2:

Rounding 653 so that it has only one non-zero digit is rounding it to nearest hundred.

653 rounds to nearest hundred as 700 as tens digit is 5.

Step 3:

So the estimated product after rounding each number so that it has only one non-zero digit is

9000 × 700 = 6300000

Q 2 - Estimate the product 6853 × 535 by first rounding each number so that it has only one non-zero digit

A - 3200000

B - 3500000

C - 3300000

D - 3600000

Answer : B

Explanation

Step 1:

Rounding 6853 so that it has only one non-zero digit is rounding it to nearest thousand.

6853 rounds to nearest thousand as 7000 as hundreds digit 8 > 5.

Step 2:

Rounding 535 so that it has only one non-zero digit is rounding it to nearest hundred.

535 rounds to nearest hundred as 500 as tens digit 3 < 5.

Step 3:

So the estimated product after rounding each number so that it has only one non-zero digit is

7000 × 500 = 3500000

Q 3 - Estimate the product 617 × 84 by first rounding each number so that it has only one non-zero digit.

A - 40000

B - 42000

C - 45000

D - 48000

Answer : D

Explanation

Step 1:

Rounding 617 so that it has only one non-zero digit is rounding it to nearest hundred.

617 rounds to 600 as tens digit 1 < 5.

Step 2:

Rounding 84 so that it has only one non-zero digit is rounding it to nearest ten.

84 rounds down to 80 as ones digit 4 < 5.

Step 3:

So the estimated product after rounding each number so that it has only one non-zero digit is

600 × 80 = 48000

Q 4 - Estimate the product 3832 × 346 by first rounding each number so that it has only one non-zero digit

A - 1200000

B - 1000000

C - 1500000

D - 1800000

Answer : A

Step 1:

Rounding 3832 so that it has only one non-zero digit is rounding it to nearest thousand.

3832 rounds up to 4000 as the hundreds digit 8 > 5.

Step 2:

Rounding 346 so that it has only one non-zero digit is rounding it to nearest hundred.

346 rounds to nearest hundred as 300 as tens digit 4 < 5.

Step 3:

Explanation

So the estimated product after rounding each number so that it has only one non-zero digit is

4000 × 300 = 1200000

Q 5 - Estimate the product 395 × 26 by first rounding each number so that it has only one non-zero digit.

A - 10000

B - 12000

C - 14000

D - 15000

Answer : B

Explanation

Step 1:

Rounding 395 so that it has only one non-zero digit is rounding it to nearest hundred.

395 rounds to nearest hundred as 400 as tens digit 9 > 5.

Step 2:

Rounding 26 so that it has only one non-zero digit is rounding it to nearest ten.

26 rounds to nearest ten as 30 as its ones digit 6 > 5.

Step 3:

so the estimated product after rounding each number so that it has only one non-zero digit is

400 × 30 = 12000

Q 6 - Estimate the product 847 × 38 by first rounding each number so that it has only one non-zero digit.

A - 30000

B - 28000

C - 32000

D - 33000

Answer : C

Explanation

Step 1:

Rounding 847 so that it has only one non-zero digit is rounding it to nearest hundred.

847 rounds to nearest hundred as 800 as tens digit 4 < 5.

Step 2:

Rounding 38 so that it has only one non-zero digit is rounding it to nearest ten.

38 rounds to nearest ten as 40 as ones digit 8 > 5.

Step 3:

So the estimated product after rounding each number so that it has only one non-zero digit is

800 × 40 = 32000

Q 7 - Estimate the product 893 × 53 by first rounding each number so that it has only one non-zero digit.

A - 42000

B - 40000

C - 48000

D - 45000

Answer : D

Explanation

Step 1:

Rounding 893 so that it has only one non-zero digit is rounding it to nearest hundred.

893 rounds to nearest hundred as 900 as tens digit 9 > 5.

Step 2:

Rounding 53 so that it has only one non-zero digit is rounding it to nearest ten.

53 rounds to nearest ten as 50 as ones digit 3 < 5.

Step 3:

So the estimated product after rounding each number so that it has only one non-zero digit is

900 × 50 = 45000

Q 8 - Estimate the product 2082 × 178 by first rounding each number so that it has only one non-zero digit

A - 600000

B - 400000

C - 500000

D - 800000

Answer : B

Explanation

Step 1:

Rounding 2082 so that it has only one non-zero digit is rounding it to nearest thousand.

2082 rounds to nearest thousand as 2000 as hundreds digit 0 < 5.

Step 2:

Rounding 178 so that it has only one non-zero digit is rounding it to nearest hundred.

178 rounds to nearest hundred as 200 as tens digit 7 > 5.

Step 3:

The estimated product after rounding each number so that it has only one non-zero digit is

2000 × 200 = 400000

Q 9 - Estimate the product 552 × 82 by first rounding each number so that it has only one non-zero digit.

A - 48000

B - 46000

C - 45000

D - 42000

Answer : A

Explanation

Step 1:

Rounding 552 so that it has only one non-zero digit is rounding it to nearest hundred.

552 rounds to nearest hundred as 600 as tens digit is 5.

Step 2:

Rounding 82 so that it has only one non-zero digit is rounding it to nearest ten.

82 rounds to nearest ten as 80 as ones digit 2 < 5.

Step 3:

So the estimated product after rounding each number so that it has only one non-zero digit is

600 × 80 = 48000

Q 10 - Estimate the product 6803 × 537 by first rounding each number so that it has only one non-zero digit

A - 2500000

B - 3000000

C - 3500000

D - 4000000

Answer : C

Explanation

Step 1:

Rounding 6803 so that it has only one non-zero digit is rounding it to nearest thousand.

6803 rounds to nearest thousand as 7000 as hundreds digit 8 > 5.

Step 2:

Rounding 537 so that it has only one non-zero digit is rounding it to nearest hundred.

537 rounds to nearest hundred as 500 as tens digit 3 < 5.

Step 3:

So the estimated product after rounding each number so that it has only one non-zero digit is

7000 × 500 = 3500000


estimating_product_of_whole_numbers.htm

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