Grade 4 - Progress in Mathematics

Round Decimals

13-6

0.4 0.5

0.40 0.41 0.42 0.43 0.44 0.45 0.46 0.47 0.48 0.49 0.50

0.42is closer

to 0.4.

Round downto 0.4.

0.45is halfway

between 0.4and 0.5.

Round upto 0.5.

0.48is closer

to 0.5.

Round upto 0.5.

A number line can help you to round decimals.

Round to the nearest tenth: 0.42, 0.45, and 0.48.

Yo u can round decimals the

same way you round whole numbers:


Find the place you are rounding to.


Look at the digit to its right.

Round to the nearest tenth: Round to the nearest one:

1.35, 5.62, and 2.48. 4.09, 6.7, and 8.54.

1.3 5 4. 09

1.4 4

5.6 2 6. 7

5.6 7

2.4 8 8. 54

2.5 9

Do not write zeros to the right of the place

you are rounding to.

5 
 5

Round up to 1.4.

2  5

Round down to 5.6.

8  5

Round up to 2.5.

5 
 5

Round up to 9.

7  5

Round up to 7.

0  5

Round down to 4.

Remember: If the digit is

less than 5, round down.

If the digit is5 or more,

round up.

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