Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 71 · 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. 1.35 × 12 =
2. 2.75 × 20 =
3. 3.32 × 35 =
4. 4.125 × 18 =
5. 5.24 × 15 =
6. 6.45 × 30 =
7. 7.15 × 12 =
8. 8.25 × 14 =
9. 9.30 × 25 =
10. 10.25 × 6 =
11. 11.55 × 28 =
12. 12.35 × 38 =
13. 13.28 × 75 =
14. 14.45 × 28 =
15. 15.125 × 20 =
16. 16.35 × 38 =
17. 17.25 × 28 =
18. 18.8 × 35 =
19. 19.35 × 34 =
20. 20.8 × 15 =
21. 21.28 × 65 =
22. 22.55 × 38 =
23. 23.45 × 20 =
24. 24.35 × 38 =
25. 25.55 × 36 =
26. 26.65 × 36 =
27. 27.18 × 125 =
28. 28.16 × 65 =
29. 29.20 × 45 =
30. 30.45 × 34 =
31. 31.35 × 40 =
32. 32.18 × 125 =
33. 33.40 × 75 =
34. 34.14 × 45 =
35. 35.32 × 15 =
36. 36.65 × 40 =
37. 37.15 × 34 =
38. 38.75 × 12 =
39. 39.12 × 15 =
40. 40.65 × 24 =

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