Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 38 · 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. 2.8 × 45 =
3. 3.28 × 55 =
4. 4.35 × 10 =
5. 5.40 × 25 =
6. 6.16 × 15 =
7. 7.30 × 65 =
8. 8.28 × 75 =
9. 9.25 × 10 =
10. 10.14 × 125 =
11. 11.38 × 65 =
12. 12.30 × 15 =
13. 13.75 × 32 =
14. 14.35 × 14 =
15. 15.15 × 28 =
16. 16.45 × 14 =
17. 17.75 × 16 =
18. 18.12 × 35 =
19. 19.18 × 75 =
20. 20.32 × 15 =
21. 21.16 × 15 =
22. 22.36 × 25 =
23. 23.16 × 25 =
24. 24.32 × 125 =
25. 25.25 × 10 =
26. 26.55 × 22 =
27. 27.32 × 15 =
28. 28.25 × 22 =
29. 29.30 × 25 =
30. 30.35 × 38 =
31. 31.40 × 25 =
32. 32.20 × 35 =
33. 33.65 × 38 =
34. 34.30 × 15 =
35. 35.15 × 6 =
36. 36.26 × 15 =
37. 37.8 × 75 =
38. 38.38 × 65 =
39. 39.55 × 14 =
40. 40.38 × 25 =

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