Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 414 · 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. 1.32 × 25 =
2. 2.25 × 16 =
3. 3.40 × 55 =
4. 4.45 × 24 =
5. 5.25 × 26 =
6. 6.30 × 15 =
7. 7.32 × 35 =
8. 8.75 × 36 =
9. 9.38 × 15 =
10. 10.30 × 65 =
11. 11.15 × 6 =
12. 12.32 × 75 =
13. 13.15 × 16 =
14. 14.125 × 16 =
15. 15.55 × 12 =
16. 16.28 × 45 =
17. 17.25 × 14 =
18. 18.75 × 24 =
19. 19.25 × 18 =
20. 20.35 × 36 =
21. 21.55 × 22 =
22. 22.14 × 75 =
23. 23.8 × 125 =
24. 24.12 × 65 =
25. 25.15 × 40 =
26. 26.38 × 55 =
27. 27.25 × 22 =
28. 28.65 × 16 =
29. 29.25 × 10 =
30. 30.25 × 12 =
31. 31.35 × 8 =
32. 32.65 × 32 =
33. 33.65 × 34 =
34. 34.38 × 15 =
35. 35.26 × 125 =
36. 36.20 × 75 =
37. 37.75 × 12 =
38. 38.22 × 55 =
39. 39.15 × 6 =
40. 40.25 × 34 =

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