Today we looked at rounding using decimal places (dp) or significant figures (sf). The rules for both are the same:
- Count how many sf or dp you want to keep.
- Circle the next number.
- If this number is 0,1,2,3 or 4 then drop the circled number and everything to the right. (Stay the same). If this number is 5,6,7,8 or 9 then round the number before up by one, and then drop. (Round up)
- For sf you may need to add zeros because the rounded number should be close to the original number.

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