Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 783 · 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. 1.30 × 125 =
2. 2.25 × 22 =
3. 3.25 × 28 =
4. 4.32 × 45 =
5. 5.25 × 18 =
6. 6.15 × 26 =
7. 7.38 × 25 =
8. 8.12 × 35 =
9. 9.55 × 34 =
10. 10.20 × 75 =
11. 11.12 × 65 =
12. 12.45 × 22 =
13. 13.40 × 35 =
14. 14.65 × 10 =
15. 15.55 × 16 =
16. 16.65 × 40 =
17. 17.35 × 16 =
18. 18.55 × 8 =
19. 19.32 × 25 =
20. 20.25 × 38 =
21. 21.15 × 26 =
22. 22.14 × 15 =
23. 23.75 × 32 =
24. 24.75 × 10 =
25. 25.25 × 16 =
26. 26.55 × 24 =
27. 27.75 × 38 =
28. 28.35 × 12 =
29. 29.28 × 45 =
30. 30.15 × 30 =
31. 31.75 × 16 =
32. 32.35 × 26 =
33. 33.25 × 40 =
34. 34.36 × 75 =
35. 35.55 × 38 =
36. 36.45 × 6 =
37. 37.25 × 40 =
38. 38.55 × 30 =
39. 39.45 × 20 =
40. 40.15 × 26 =

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