Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 913 · 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 × 32 =
2. 2.25 × 40 =
3. 3.15 × 8 =
4. 4.14 × 65 =
5. 5.20 × 25 =
6. 6.15 × 14 =
7. 7.55 × 8 =
8. 8.25 × 14 =
9. 9.12 × 45 =
10. 10.15 × 22 =
11. 11.25 × 12 =
12. 12.65 × 38 =
13. 13.40 × 15 =
14. 14.45 × 16 =
15. 15.34 × 65 =
16. 16.38 × 75 =
17. 17.75 × 10 =
18. 18.36 × 15 =
19. 19.25 × 14 =
20. 20.14 × 25 =
21. 21.15 × 20 =
22. 22.35 × 8 =
23. 23.35 × 16 =
24. 24.32 × 75 =
25. 25.45 × 36 =
26. 26.12 × 125 =
27. 27.25 × 28 =
28. 28.15 × 6 =
29. 29.35 × 8 =
30. 30.20 × 65 =
31. 31.38 × 65 =
32. 32.30 × 55 =
33. 33.30 × 35 =
34. 34.45 × 28 =
35. 35.10 × 125 =
36. 36.25 × 34 =
37. 37.15 × 28 =
38. 38.35 × 28 =
39. 39.24 × 125 =
40. 40.65 × 16 =

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