Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 687 · 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. 1.75 × 32 =
2. 2.15 × 26 =
3. 3.35 × 30 =
4. 4.35 × 38 =
5. 5.15 × 10 =
6. 6.25 × 10 =
7. 7.30 × 45 =
8. 8.12 × 65 =
9. 9.25 × 26 =
10. 10.12 × 55 =
11. 11.38 × 55 =
12. 12.26 × 25 =
13. 13.10 × 35 =
14. 14.25 × 14 =
15. 15.75 × 12 =
16. 16.65 × 6 =
17. 17.15 × 8 =
18. 18.38 × 65 =
19. 19.38 × 55 =
20. 20.32 × 25 =
21. 21.10 × 55 =
22. 22.35 × 30 =
23. 23.22 × 25 =
24. 24.35 × 12 =
25. 25.25 × 24 =
26. 26.26 × 75 =
27. 27.12 × 25 =
28. 28.14 × 15 =
29. 29.55 × 36 =
30. 30.12 × 65 =
31. 31.10 × 55 =
32. 32.65 × 22 =
33. 33.55 × 20 =
34. 34.20 × 65 =
35. 35.25 × 32 =
36. 36.24 × 45 =
37. 37.75 × 34 =
38. 38.40 × 15 =
39. 39.28 × 45 =
40. 40.65 × 36 =

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