Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 769 · 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 × 38 =
2. 2.25 × 16 =
3. 3.32 × 125 =
4. 4.26 × 35 =
5. 5.20 × 75 =
6. 6.38 × 45 =
7. 7.24 × 25 =
8. 8.65 × 32 =
9. 9.32 × 25 =
10. 10.18 × 55 =
11. 11.30 × 75 =
12. 12.12 × 25 =
13. 13.15 × 24 =
14. 14.28 × 15 =
15. 15.15 × 28 =
16. 16.24 × 35 =
17. 17.22 × 55 =
18. 18.25 × 8 =
19. 19.45 × 24 =
20. 20.38 × 55 =
21. 21.75 × 16 =
22. 22.75 × 28 =
23. 23.18 × 45 =
24. 24.125 × 26 =
25. 25.12 × 75 =
26. 26.28 × 65 =
27. 27.18 × 15 =
28. 28.38 × 35 =
29. 29.125 × 6 =
30. 30.30 × 35 =
31. 31.40 × 65 =
32. 32.35 × 38 =
33. 33.36 × 45 =
34. 34.38 × 15 =
35. 35.125 × 38 =
36. 36.45 × 10 =
37. 37.40 × 75 =
38. 38.25 × 20 =
39. 39.38 × 55 =
40. 40.65 × 40 =

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