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©G Dear 2010 – Not to be sold/Free to use
Rounding OffRounding OffStage 6 - Year 11Stage 6 - Year 11
Mathematics
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Rounding OffRounding OffRounding OffRounding Off
To round off decimals we use the 5/4 rounding.
Example 1: Round 3.1418 to 3 decimal places.
Look at the 4th decimal place.
therefore we round it up to 3.142.
Example 2: Round 2.452 to 2 decimal places.
Look at the 3rd decimal place.
therefore we round it down to 2.45.
Is it 5 or greater?
Is it 5 or greater?
It is,
It is not,
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Rounding Off ExercisesRounding Off ExercisesRounding Off ExercisesRounding Off Exercises
Round to the number of decimal places between the [ ] signs.
a) 12.512 [2] 12.51b) 3.4428 [3] 3.443c) 27.252 [1] 27.3d) 0.0901 [2] 0.09e) 2.999 [1] 3.0f) 4.951 [0] 5g) 51.1124 [3] 51.112
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