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In this activity, 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
Does that make sense?
Let's get started!
