Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 162 · 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. 1.32 × 45 =
2. 2.55 × 26 =
3. 3.55 × 16 =
4. 4.45 × 18 =
5. 5.55 × 24 =
6. 6.25 × 32 =
7. 7.38 × 15 =
8. 8.10 × 35 =
9. 9.65 × 36 =
10. 10.65 × 14 =
11. 11.10 × 45 =
12. 12.6 × 15 =
13. 13.38 × 25 =
14. 14.45 × 24 =
15. 15.125 × 30 =
16. 16.35 × 28 =
17. 17.35 × 14 =
18. 18.18 × 35 =
19. 19.55 × 38 =
20. 20.26 × 75 =
21. 21.75 × 32 =
22. 22.36 × 65 =
23. 23.15 × 16 =
24. 24.55 × 30 =
25. 25.75 × 40 =
26. 26.35 × 18 =
27. 27.35 × 10 =
28. 28.10 × 45 =
29. 29.25 × 18 =
30. 30.25 × 12 =
31. 31.14 × 35 =
32. 32.40 × 75 =
33. 33.65 × 30 =
34. 34.8 × 55 =
35. 35.8 × 65 =
36. 36.12 × 65 =
37. 37.35 × 6 =
38. 38.6 × 75 =
39. 39.20 × 65 =
40. 40.14 × 35 =

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