Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 381 · 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. 1.32 × 65 =
2. 2.32 × 75 =
3. 3.16 × 25 =
4. 4.36 × 125 =
5. 5.35 × 20 =
6. 6.75 × 16 =
7. 7.125 × 24 =
8. 8.75 × 16 =
9. 9.25 × 14 =
10. 10.45 × 32 =
11. 11.38 × 125 =
12. 12.22 × 25 =
13. 13.75 × 6 =
14. 14.25 × 28 =
15. 15.125 × 20 =
16. 16.35 × 6 =
17. 17.45 × 40 =
18. 18.34 × 65 =
19. 19.32 × 45 =
20. 20.10 × 125 =
21. 21.35 × 28 =
22. 22.12 × 25 =
23. 23.35 × 28 =
24. 24.24 × 45 =
25. 25.65 × 38 =
26. 26.10 × 65 =
27. 27.25 × 24 =
28. 28.25 × 24 =
29. 29.40 × 25 =
30. 30.10 × 25 =
31. 31.25 × 24 =
32. 32.15 × 8 =
33. 33.26 × 55 =
34. 34.35 × 20 =
35. 35.15 × 38 =
36. 36.30 × 25 =
37. 37.125 × 14 =
38. 38.15 × 16 =
39. 39.75 × 20 =
40. 40.20 × 75 =

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