1. Rounding Numbers.
By Abigail Stivala.

2. Rules: If the number ends in numbers 1 to 4 round to the ten before
If it ends in numbers 6 to 9, round to the ten after
If it ends in 5 (which is half way between two tens) always round up to the higher ten

3. Rounding to 10
556
560

4. Rounding to 10
323
320

5. Rounding to 10
554
550

6. Rounding to 10
899
900

7. Rounding to 100
644
600

8. Rounding to 100
235
200

9. Rounding to 100
668
700

10. Rounding to 100
,000
999
1,000