Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 941 · 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. 1.22 × 65 =
2. 2.40 × 15 =
3. 3.45 × 30 =
4. 4.40 × 15 =
5. 5.15 × 34 =
6. 6.14 × 15 =
7. 7.30 × 55 =
8. 8.10 × 25 =
9. 9.32 × 25 =
10. 10.25 × 6 =
11. 11.10 × 25 =
12. 12.25 × 24 =
13. 13.15 × 12 =
14. 14.65 × 18 =
15. 15.55 × 10 =
16. 16.28 × 75 =
17. 17.18 × 35 =
18. 18.55 × 40 =
19. 19.14 × 75 =
20. 20.22 × 35 =
21. 21.35 × 16 =
22. 22.55 × 40 =
23. 23.8 × 125 =
24. 24.75 × 34 =
25. 25.25 × 30 =
26. 26.15 × 20 =
27. 27.6 × 45 =
28. 28.12 × 25 =
29. 29.55 × 34 =
30. 30.55 × 6 =
31. 31.35 × 34 =
32. 32.36 × 75 =
33. 33.18 × 45 =
34. 34.35 × 14 =
35. 35.22 × 125 =
36. 36.8 × 75 =
37. 37.15 × 12 =
38. 38.125 × 8 =
39. 39.125 × 8 =
40. 40.35 × 6 =

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