Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 568 · 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. 1.26 × 15 =
2. 2.12 × 35 =
3. 3.25 × 16 =
4. 4.25 × 6 =
5. 5.10 × 75 =
6. 6.35 × 34 =
7. 7.15 × 20 =
8. 8.18 × 15 =
9. 9.28 × 55 =
10. 10.55 × 34 =
11. 11.65 × 8 =
12. 12.55 × 12 =
13. 13.34 × 65 =
14. 14.65 × 30 =
15. 15.18 × 55 =
16. 16.32 × 125 =
17. 17.45 × 14 =
18. 18.12 × 125 =
19. 19.30 × 55 =
20. 20.65 × 40 =
21. 21.45 × 22 =
22. 22.45 × 18 =
23. 23.45 × 6 =
24. 24.24 × 75 =
25. 25.28 × 25 =
26. 26.8 × 65 =
27. 27.8 × 75 =
28. 28.25 × 22 =
29. 29.10 × 35 =
30. 30.22 × 35 =
31. 31.25 × 22 =
32. 32.22 × 15 =
33. 33.25 × 30 =
34. 34.8 × 25 =
35. 35.40 × 125 =
36. 36.125 × 20 =
37. 37.65 × 26 =
38. 38.16 × 55 =
39. 39.18 × 65 =
40. 40.28 × 35 =

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