Rounding decimals

Question 2

Round 3.938 correct to 2 decimal places (hundredths)

3.938 lies between 3.930 and 3.940.
8 is greater than 5.
Therefore we round it up to 3.94.


	As shown on the number line, 3.938 is closer to 3.940 than to 3.930.

Question 3

Round 1.1285 correct to 3 decimal places (thousandths)

1.1285 lies between 1.1280 and 1.1290.
By convention as the following digit is 5 the number is rounded up.
Therefore we round it up to 1.129.

Diagram of a number line starting from 1.128 to 1.129 with an increment of 0.0001. Red arrow pointing to 1.1285.

Rounding using rules

Question 4

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