 # Round a Decimal Number to 1 Decimal Place

In this worksheet, students round decimal numbers to 1 decimal place. Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Round/Approximate Numbers Appropriately

Difficulty level:   ### QUESTION 1 of 10

In this worksheet, we will round a decimal number to 1 decimal place.

Method

To round a decimal to 1 decimal place, we check the digit in the 2nd decimal place (i.e. the hundredths column).

If the hundredths digit is 5 or more, round UP.

If the hundredths digit is 4 or less, round DOWN.

Examples

19.786 is between the 1 decimal place numbers 19.7 and 19.8

The 8 hundredths tell us to round UP to 19.8

19.786 rounds up to 19.8 to 1 dp

19.049 is between the 1 decimal place numbers 19.0 and 19.1

The 4 hundredths tell us to round DOWN to 19.0

19.049 rounds down to 19.0 to 1 dp

Round the following number to one decimal place.

41.7133

Round the following number to one decimal place.

76.9054

Round the following number to one decimal place.

85.8452

Round the following number to one decimal place.

44.8741

Round the following number to one decimal place.

67.977

Round the following number to one decimal place.

40.852

Round the following number to one decimal place.

99.372

Round the following number to one decimal place.

43.0158

Round the following number to one decimal place.

29.7983

Round the following number to one decimal place.

99.9804

• Question 1

Round the following number to one decimal place.

41.7133

41.7
EDDIE SAYS

41.7133

The hundredths column is 1

This means the answer rounds down

• Question 2

Round the following number to one decimal place.

76.9054

76.9
EDDIE SAYS

76.9054

The hundredths column is 0

This means the answer rounds down

• Question 3

Round the following number to one decimal place.

85.8452

85.8
EDDIE SAYS

85.8452

The hundredths column is 4

This means the answer rounds down

• Question 4

Round the following number to one decimal place.

44.8741

44.9
EDDIE SAYS

44.8741

The hundredths column is 7

This means the answer rounds up

• Question 5

Round the following number to one decimal place.

67.977

68.0
EDDIE SAYS

67.977

The hundredths column is 7

This means the answer rounds up

Don't forget that you cannot put 68 as the questions asks for 1dp
• Question 6

Round the following number to one decimal place.

40.852

40.9
EDDIE SAYS

40.852

The hundredths column is 5

This means the answer rounds up

• Question 7

Round the following number to one decimal place.

99.372

99.4
EDDIE SAYS

99.372

The hundredths column is 7

This means the answer rounds up

• Question 8

Round the following number to one decimal place.

43.0158

43.0
EDDIE SAYS

43.0158

The hundredths column is 1

This means the answer rounds downup

• Question 9

Round the following number to one decimal place.

29.7983

29.8
EDDIE SAYS

29.7983

The hundredths column is 9

This means the answer rounds up

• Question 10

Round the following number to one decimal place.

99.9804

100.0
EDDIE SAYS

99.9804

The hundredths column is 8

This means the answer rounds downup

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