Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 62 · 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. 1.25 × 36 =
2. 2.35 × 28 =
3. 3.38 × 65 =
4. 4.65 × 34 =
5. 5.35 × 26 =
6. 6.65 × 22 =
7. 7.25 × 36 =
8. 8.10 × 55 =
9. 9.32 × 75 =
10. 10.38 × 15 =
11. 11.32 × 125 =
12. 12.65 × 38 =
13. 13.34 × 65 =
14. 14.16 × 15 =
15. 15.75 × 30 =
16. 16.16 × 65 =
17. 17.28 × 15 =
18. 18.35 × 24 =
19. 19.125 × 14 =
20. 20.25 × 26 =
21. 21.15 × 32 =
22. 22.35 × 40 =
23. 23.10 × 55 =
24. 24.22 × 125 =
25. 25.35 × 18 =
26. 26.24 × 45 =
27. 27.12 × 75 =
28. 28.32 × 55 =
29. 29.45 × 6 =
30. 30.15 × 12 =
31. 31.75 × 34 =
32. 32.28 × 35 =
33. 33.35 × 20 =
34. 34.26 × 55 =
35. 35.36 × 125 =
36. 36.45 × 36 =
37. 37.65 × 40 =
38. 38.65 × 22 =
39. 39.55 × 24 =
40. 40.125 × 20 =

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