Let's revise the rounding off of decimals.
IMPORTANT!
Rounding off to the nearest...
- tenth is the same as rounding off to 1 dp. (2 dp in working)
- hundredth is the same as rounding off to 2 dp.. (3 dp in working)
- thousandth is the same as rounding off to 3 dp. (4 dp in working)
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