Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 770 · 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. 1.15 × 32 =
2. 2.25 × 24 =
3. 3.55 × 12 =
4. 4.38 × 75 =
5. 5.25 × 24 =
6. 6.8 × 25 =
7. 7.65 × 22 =
8. 8.25 × 16 =
9. 9.75 × 8 =
10. 10.55 × 26 =
11. 11.16 × 25 =
12. 12.65 × 36 =
13. 13.15 × 8 =
14. 14.22 × 25 =
15. 15.15 × 28 =
16. 16.22 × 75 =
17. 17.25 × 22 =
18. 18.125 × 26 =
19. 19.125 × 28 =
20. 20.18 × 125 =
21. 21.55 × 28 =
22. 22.35 × 28 =
23. 23.6 × 25 =
24. 24.12 × 55 =
25. 25.20 × 35 =
26. 26.75 × 6 =
27. 27.125 × 38 =
28. 28.18 × 55 =
29. 29.12 × 55 =
30. 30.32 × 15 =
31. 31.10 × 55 =
32. 32.75 × 18 =
33. 33.45 × 12 =
34. 34.65 × 34 =
35. 35.125 × 8 =
36. 36.55 × 38 =
37. 37.36 × 75 =
38. 38.26 × 15 =
39. 39.15 × 14 =
40. 40.35 × 12 =

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