# Multiply with Decimals and Estimate Answers

In this worksheet, students perform multiplications by rounding numbers before carrying out the calculation.

Key stage:  KS 2

Curriculum topic:   Maths and Numerical Reasoning

Curriculum subtopic:   Decimals

Difficulty level:

### QUESTION 1 of 10

We can estimate the answers to these multiplications by rounding both decimals to the nearest whole numbers before carrying out the multiplication.

Example:

4.11 × 8.75 can be estimated as 4 × 9

= 36

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

7.71  ×  8.93  = A  × B  =  C

## Column B

A
9
B
8
C
72

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

10.3  ×  3.3  =   A  ×  B  =  C

## Column B

A
10
B
3
C
30

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

9.66  ×  5.16  =   A  ×  B  =   C

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

4.68  ×  4.05  =   A  ×  B  =   C

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

4.53  ×  9.37  =   A  ×  =   C

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

9.05  ×  5.83  =   A  ×  B  =   C

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

8.78  ×  10.01  =   A  ×  B  =  C

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

8.87  ×  1.36  =  A  ×  B  =   C

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

1.73  ×  3.06  =   × B  =   C

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

2.43  ×  9.31 =   A  ×  B  =   C

• Question 1

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

7.71  ×  8.93  = A  × B  =  C

## Column B

A
8
B
9
C
72
• Question 2

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

10.3  ×  3.3  =   A  ×  B  =  C

## Column B

A
10
B
3
C
30
• Question 3

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

9.66  ×  5.16  =   A  ×  B  =   C

• Question 4

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

4.68  ×  4.05  =   A  ×  B  =   C

• Question 5

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

4.53  ×  9.37  =   A  ×  =   C

• Question 6

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

9.05  ×  5.83  =   A  ×  B  =   C

• Question 7

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

8.78  ×  10.01  =   A  ×  B  =  C

• Question 8

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

8.87  ×  1.36  =  A  ×  B  =   C

• Question 9

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

1.73  ×  3.06  =   × B  =   C

• Question 10

Estimate the answers to the following problems by rounding both decimals to the nearest whole numbers first and then multiplying.

2.43  ×  9.31 =   A  ×  B  =   C

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