Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 863 · 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 × 34 =
2. 2.55 × 16 =
3. 3.15 × 30 =
4. 4.125 × 32 =
5. 5.45 × 6 =
6. 6.40 × 35 =
7. 7.35 × 38 =
8. 8.15 × 32 =
9. 9.36 × 25 =
10. 10.45 × 32 =
11. 11.20 × 55 =
12. 12.125 × 12 =
13. 13.6 × 15 =
14. 14.16 × 125 =
15. 15.14 × 15 =
16. 16.15 × 8 =
17. 17.38 × 65 =
18. 18.35 × 24 =
19. 19.45 × 8 =
20. 20.24 × 35 =
21. 21.30 × 55 =
22. 22.40 × 65 =
23. 23.45 × 36 =
24. 24.35 × 16 =
25. 25.14 × 65 =
26. 26.8 × 25 =
27. 27.75 × 40 =
28. 28.65 × 6 =
29. 29.35 × 18 =
30. 30.55 × 34 =
31. 31.38 × 45 =
32. 32.12 × 15 =
33. 33.28 × 35 =
34. 34.15 × 32 =
35. 35.36 × 45 =
36. 36.10 × 15 =
37. 37.10 × 35 =
38. 38.28 × 15 =
39. 39.45 × 24 =
40. 40.22 × 15 =

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