~ Math: Estimation / Rounding off ~

Remember to revise your Math:

1) Rounding off to the nearest hundred (look at the digit in the tens place)
2) Rounding off to the nearest tens (look at the digit in the ones place)
3) Rounding off with addition

1 ----> round down
2 ----> round down
3 ----> round down
4 ----> round down

5 ----> round up
6 ----> round up
7 ----> round up
8 ----> round up
9 ----> round up