Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 692 · 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. 1.35 × 32 =
2. 2.65 × 14 =
3. 3.12 × 65 =
4. 4.20 × 125 =
5. 5.55 × 10 =
6. 6.55 × 24 =
7. 7.12 × 65 =
8. 8.25 × 30 =
9. 9.6 × 125 =
10. 10.125 × 40 =
11. 11.10 × 65 =
12. 12.45 × 40 =
13. 13.15 × 24 =
14. 14.25 × 34 =
15. 15.18 × 55 =
16. 16.8 × 15 =
17. 17.35 × 20 =
18. 18.32 × 25 =
19. 19.65 × 32 =
20. 20.75 × 12 =
21. 21.125 × 24 =
22. 22.25 × 40 =
23. 23.75 × 24 =
24. 24.35 × 18 =
25. 25.65 × 28 =
26. 26.125 × 12 =
27. 27.125 × 20 =
28. 28.55 × 10 =
29. 29.45 × 34 =
30. 30.55 × 12 =
31. 31.75 × 32 =
32. 32.20 × 15 =
33. 33.24 × 75 =
34. 34.25 × 36 =
35. 35.15 × 28 =
36. 36.125 × 18 =
37. 37.75 × 12 =
38. 38.40 × 65 =
39. 39.34 × 45 =
40. 40.125 × 6 =

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