Rounding up – and down!

Mental Mathematics Starters

Activity 3b

Mathematics Objective

Y4: Round any positive integer less than 1000 to the nearest …. 100.

Using this should help you learn:

To say which hundred a given number is the nearest to.

Target = 17 correct

1. Write this to the nearest hundred:

63137

2. Write this to the nearest hundred:

418781

3. Write this to the nearest hundred:

213422

4. Write this to the nearest hundred:

862289

5. Write this to the nearest hundred:

182426

6. Write this to the nearest hundred:

516713

7. Write this to the nearest hundred:

567957

8. Write this to the nearest hundred:

172622

9. Write this to the nearest hundred:

349228

10. Write this to the nearest hundred:

982532

11. Write this to the nearest hundred:

99842

12. Write this to the nearest hundred:

565479

13. Write this to the nearest hundred:

342619

14. Write this to the nearest hundred:

214477

15. Write this to the nearest hundred:

931845

16. Write this to the nearest hundred:

468938

17. Write this to the nearest hundred:

727453

18. Write this to the nearest hundred:

254192

19. Write this to the nearest hundred:

346450

20. Write this to the nearest hundred:

250498

Evaluation . . . Did you:

Say correctly which hundred at least 17 of these numbers were nearest to?