Divide Decimals and Estimate the Answer (1)

In this worksheet, students round two decimals to the nearest whole numbers before subtracting them.

Key stage:  KS 2

Curriculum topic:   Number: Fractions, Decimals and Percentages

Curriculum subtopic:   Solve Rounding Problems

Difficulty level:

QUESTION 1 of 10

We can estimate the answers by first rounding both decimals to the nearest whole numbers and then finding the difference between them.

Example:

45.7 - 16.4 can be estimated by rounding each number to the nearest whole numbers 46 - 16

= 30

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

52.8 - 12.8  =   ____  -  ____  =   ____

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

35.3 - 28.6  =   ____  -  ____  =   ____

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

43.7 - 14.9  =   ____  -  ____  =   ____

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

84.7 - 37.2  =   ____  -  ____  =   ____

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

66 - 12.1  =   ____  -  ____  =   ____

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

87.6 - 36.4  =   ____  -  ____  =   ____

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

25.6 - 19.8  =   ____  -  ____  =   ____

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

41.2 - 10.2  =   ____  -  ____  =   ____

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

30.6 - 13  =   ____  -  ____  =   ____

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

20.7 - 17.2  =   ____  -  ____  =   ____

• Question 1

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

52.8 - 12.8  =   ____  -  ____  =   ____

53
13
40
EDDIE SAYS
53 - 13 = 40
• Question 2

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

35.3 - 28.6  =   ____  -  ____  =   ____

35
29
6
EDDIE SAYS
35 - 29 = 6
• Question 3

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

43.7 - 14.9  =   ____  -  ____  =   ____

44
15
29
EDDIE SAYS
44 - 15 = 29
• Question 4

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

84.7 - 37.2  =   ____  -  ____  =   ____

85
37
48
EDDIE SAYS
85 - 37 = 48
• Question 5

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

66 - 12.1  =   ____  -  ____  =   ____

66
12
54
EDDIE SAYS
66 - 12 = 54
• Question 6

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

87.6 - 36.4  =   ____  -  ____  =   ____

88
36
52
EDDIE SAYS
88 - 36 = 52
• Question 7

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

25.6 - 19.8  =   ____  -  ____  =   ____

26
20
6
EDDIE SAYS
26 - 20 = 6
• Question 8

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

41.2 - 10.2  =   ____  -  ____  =   ____

41
10
31
EDDIE SAYS
41 -10 = 31
• Question 9

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

30.6 - 13  =   ____  -  ____  =   ____

31
13
18
EDDIE SAYS
31 - 13 = 18
• Question 10

Estimate the answer to the subtraction by rounding to the nearest whole numbers first.

20.7 - 17.2  =   ____  -  ____  =   ____

21
17
4
EDDIE SAYS
21 - 17 = 4
---- OR ----

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