Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 991 · 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 × 45 =
2. 2.15 × 26 =
3. 3.45 × 20 =
4. 4.40 × 65 =
5. 5.34 × 25 =
6. 6.22 × 15 =
7. 7.28 × 45 =
8. 8.125 × 40 =
9. 9.25 × 38 =
10. 10.36 × 35 =
11. 11.10 × 15 =
12. 12.25 × 14 =
13. 13.24 × 25 =
14. 14.75 × 14 =
15. 15.35 × 16 =
16. 16.38 × 25 =
17. 17.20 × 65 =
18. 18.30 × 15 =
19. 19.14 × 15 =
20. 20.40 × 15 =
21. 21.10 × 125 =
22. 22.65 × 26 =
23. 23.18 × 75 =
24. 24.75 × 32 =
25. 25.34 × 75 =
26. 26.18 × 125 =
27. 27.45 × 32 =
28. 28.24 × 35 =
29. 29.25 × 34 =
30. 30.35 × 30 =
31. 31.35 × 32 =
32. 32.38 × 35 =
33. 33.32 × 35 =
34. 34.15 × 12 =
35. 35.55 × 20 =
36. 36.32 × 25 =
37. 37.22 × 25 =
38. 38.6 × 35 =
39. 39.15 × 16 =
40. 40.40 × 25 =

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