Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 22 · 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. 1.10 × 55 =
2. 2.38 × 65 =
3. 3.45 × 22 =
4. 4.15 × 8 =
5. 5.65 × 12 =
6. 6.25 × 22 =
7. 7.36 × 75 =
8. 8.45 × 12 =
9. 9.14 × 75 =
10. 10.20 × 45 =
11. 11.35 × 22 =
12. 12.30 × 75 =
13. 13.30 × 65 =
14. 14.35 × 20 =
15. 15.32 × 55 =
16. 16.75 × 22 =
17. 17.45 × 38 =
18. 18.75 × 16 =
19. 19.35 × 18 =
20. 20.45 × 10 =
21. 21.15 × 12 =
22. 22.10 × 25 =
23. 23.65 × 6 =
24. 24.25 × 14 =
25. 25.30 × 15 =
26. 26.25 × 40 =
27. 27.35 × 6 =
28. 28.45 × 36 =
29. 29.45 × 8 =
30. 30.35 × 14 =
31. 31.40 × 25 =
32. 32.25 × 22 =
33. 33.8 × 65 =
34. 34.8 × 55 =
35. 35.15 × 22 =
36. 36.25 × 6 =
37. 37.12 × 45 =
38. 38.8 × 125 =
39. 39.34 × 45 =
40. 40.12 × 15 =

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