Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 159 · 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. 1.28 × 35 =
2. 2.15 × 40 =
3. 3.6 × 55 =
4. 4.15 × 36 =
5. 5.35 × 38 =
6. 6.12 × 75 =
7. 7.35 × 10 =
8. 8.22 × 15 =
9. 9.35 × 8 =
10. 10.35 × 12 =
11. 11.10 × 15 =
12. 12.10 × 15 =
13. 13.32 × 45 =
14. 14.40 × 125 =
15. 15.125 × 32 =
16. 16.22 × 15 =
17. 17.75 × 8 =
18. 18.55 × 12 =
19. 19.36 × 75 =
20. 20.28 × 75 =
21. 21.18 × 75 =
22. 22.35 × 24 =
23. 23.14 × 45 =
24. 24.55 × 38 =
25. 25.20 × 65 =
26. 26.20 × 15 =
27. 27.32 × 45 =
28. 28.22 × 25 =
29. 29.10 × 15 =
30. 30.65 × 16 =
31. 31.34 × 55 =
32. 32.35 × 22 =
33. 33.18 × 65 =
34. 34.24 × 55 =
35. 35.28 × 45 =
36. 36.35 × 10 =
37. 37.25 × 24 =
38. 38.16 × 65 =
39. 39.45 × 12 =
40. 40.10 × 15 =

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