Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 83 · 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 × 12 =
2. 2.36 × 15 =
3. 3.125 × 22 =
4. 4.36 × 125 =
5. 5.15 × 12 =
6. 6.18 × 75 =
7. 7.45 × 6 =
8. 8.35 × 12 =
9. 9.40 × 65 =
10. 10.38 × 35 =
11. 11.45 × 10 =
12. 12.12 × 35 =
13. 13.125 × 22 =
14. 14.35 × 8 =
15. 15.32 × 25 =
16. 16.20 × 55 =
17. 17.15 × 18 =
18. 18.55 × 28 =
19. 19.30 × 55 =
20. 20.55 × 14 =
21. 21.45 × 32 =
22. 22.45 × 16 =
23. 23.45 × 6 =
24. 24.6 × 25 =
25. 25.125 × 30 =
26. 26.24 × 25 =
27. 27.65 × 34 =
28. 28.26 × 35 =
29. 29.22 × 55 =
30. 30.35 × 16 =
31. 31.28 × 75 =
32. 32.55 × 22 =
33. 33.10 × 55 =
34. 34.35 × 14 =
35. 35.14 × 15 =
36. 36.25 × 6 =
37. 37.35 × 22 =
38. 38.34 × 35 =
39. 39.8 × 45 =
40. 40.35 × 38 =

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