Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 948 · 40 questions

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

1. 1.125 × 32 =
2. 2.55 × 10 =
3. 3.15 × 40 =
4. 4.24 × 55 =
5. 5.125 × 40 =
6. 6.15 × 34 =
7. 7.25 × 6 =
8. 8.12 × 35 =
9. 9.35 × 32 =
10. 10.35 × 28 =
11. 11.16 × 25 =
12. 12.15 × 30 =
13. 13.32 × 65 =
14. 14.38 × 125 =
15. 15.45 × 22 =
16. 16.65 × 40 =
17. 17.55 × 26 =
18. 18.65 × 24 =
19. 19.15 × 18 =
20. 20.55 × 24 =
21. 21.6 × 75 =
22. 22.75 × 16 =
23. 23.6 × 25 =
24. 24.15 × 8 =
25. 25.35 × 24 =
26. 26.15 × 34 =
27. 27.35 × 20 =
28. 28.20 × 25 =
29. 29.65 × 32 =
30. 30.12 × 15 =
31. 31.25 × 22 =
32. 32.75 × 10 =
33. 33.10 × 15 =
34. 34.125 × 20 =
35. 35.125 × 32 =
36. 36.12 × 35 =
37. 37.75 × 34 =
38. 38.30 × 125 =
39. 39.15 × 32 =
40. 40.55 × 20 =

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