Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 779 · 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. 1.24 × 35 =
2. 2.6 × 25 =
3. 3.8 × 125 =
4. 4.10 × 45 =
5. 5.38 × 15 =
6. 6.14 × 55 =
7. 7.22 × 35 =
8. 8.14 × 55 =
9. 9.32 × 25 =
10. 10.24 × 65 =
11. 11.35 × 12 =
12. 12.18 × 45 =
13. 13.65 × 18 =
14. 14.35 × 34 =
15. 15.125 × 18 =
16. 16.65 × 40 =
17. 17.25 × 6 =
18. 18.55 × 18 =
19. 19.35 × 8 =
20. 20.125 × 36 =
21. 21.15 × 16 =
22. 22.6 × 35 =
23. 23.45 × 20 =
24. 24.20 × 125 =
25. 25.18 × 35 =
26. 26.15 × 36 =
27. 27.65 × 18 =
28. 28.20 × 65 =
29. 29.36 × 55 =
30. 30.35 × 12 =
31. 31.35 × 32 =
32. 32.8 × 45 =
33. 33.14 × 55 =
34. 34.28 × 45 =
35. 35.8 × 45 =
36. 36.15 × 8 =
37. 37.75 × 18 =
38. 38.25 × 18 =
39. 39.35 × 6 =
40. 40.15 × 30 =

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