Rounding up – and down!

Mental Mathematics Starters

Activity 3a

Mathematics Objective

Y4: Round any positive integer less than 1000 to the nearest 10….

Using this should help you learn:

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

Target = 17 correct

1. Write this to the nearest ten:

63137

2. Write this to the nearest ten:

48711

3. Write this to the nearest ten:

23472

4. Write this to the nearest ten:

82235

5. Write this to the nearest ten:

12346

6. Write this to the nearest ten:

56673

7. Write this to the nearest ten:

27857

8. Write this to the nearest ten:

7423

9. Write this to the nearest ten:

39728

10. Write this to the nearest ten:

98561

11. Write this to the nearest ten:

99998

12. Write this to the nearest ten:

55336

13. Write this to the nearest ten:

42683

14. Write this to the nearest ten:

14547

15. Write this to the nearest ten:

31145

16. Write this to the nearest ten:

4859

17. Write this to the nearest ten:

77414

18. Write this to the nearest ten:

94962

19. Write this to the nearest ten:

36975

20. Write this to the nearest ten:

61122

Evaluation . . . Did you:

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