Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 329 · 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. 1.26 × 65 =
2. 2.15 × 38 =
3. 3.25 × 32 =
4. 4.55 × 8 =
5. 5.12 × 15 =
6. 6.65 × 28 =
7. 7.6 × 55 =
8. 8.40 × 65 =
9. 9.45 × 10 =
10. 10.14 × 15 =
11. 11.35 × 38 =
12. 12.65 × 22 =
13. 13.36 × 65 =
14. 14.38 × 125 =
15. 15.10 × 65 =
16. 16.15 × 24 =
17. 17.8 × 125 =
18. 18.75 × 28 =
19. 19.6 × 15 =
20. 20.20 × 45 =
21. 21.25 × 30 =
22. 22.40 × 75 =
23. 23.28 × 45 =
24. 24.20 × 25 =
25. 25.32 × 15 =
26. 26.55 × 22 =
27. 27.12 × 25 =
28. 28.12 × 65 =
29. 29.35 × 30 =
30. 30.24 × 55 =
31. 31.28 × 15 =
32. 32.6 × 45 =
33. 33.55 × 16 =
34. 34.55 × 32 =
35. 35.32 × 35 =
36. 36.55 × 8 =
37. 37.15 × 24 =
38. 38.22 × 55 =
39. 39.34 × 45 =
40. 40.25 × 40 =

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