Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 542 · 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. 1.10 × 35 =
2. 2.6 × 65 =
3. 3.10 × 125 =
4. 4.45 × 20 =
5. 5.25 × 28 =
6. 6.10 × 75 =
7. 7.6 × 45 =
8. 8.35 × 14 =
9. 9.45 × 10 =
10. 10.22 × 65 =
11. 11.35 × 34 =
12. 12.10 × 15 =
13. 13.40 × 25 =
14. 14.15 × 10 =
15. 15.38 × 25 =
16. 16.12 × 45 =
17. 17.25 × 40 =
18. 18.75 × 14 =
19. 19.35 × 26 =
20. 20.40 × 65 =
21. 21.15 × 16 =
22. 22.65 × 38 =
23. 23.38 × 35 =
24. 24.35 × 10 =
25. 25.25 × 38 =
26. 26.12 × 15 =
27. 27.35 × 16 =
28. 28.18 × 25 =
29. 29.26 × 35 =
30. 30.65 × 12 =
31. 31.35 × 12 =
32. 32.24 × 65 =
33. 33.45 × 28 =
34. 34.40 × 65 =
35. 35.55 × 14 =
36. 36.125 × 32 =
37. 37.36 × 75 =
38. 38.65 × 12 =
39. 39.28 × 55 =
40. 40.45 × 20 =

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