Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 469 · 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. 1.35 × 40 =
2. 2.25 × 38 =
3. 3.20 × 35 =
4. 4.26 × 45 =
5. 5.10 × 125 =
6. 6.10 × 45 =
7. 7.55 × 26 =
8. 8.35 × 32 =
9. 9.22 × 65 =
10. 10.18 × 45 =
11. 11.14 × 25 =
12. 12.65 × 32 =
13. 13.25 × 14 =
14. 14.12 × 45 =
15. 15.25 × 38 =
16. 16.14 × 125 =
17. 17.14 × 35 =
18. 18.36 × 35 =
19. 19.12 × 65 =
20. 20.55 × 24 =
21. 21.35 × 38 =
22. 22.35 × 20 =
23. 23.125 × 40 =
24. 24.75 × 24 =
25. 25.25 × 40 =
26. 26.22 × 65 =
27. 27.36 × 25 =
28. 28.55 × 38 =
29. 29.25 × 18 =
30. 30.55 × 8 =
31. 31.14 × 125 =
32. 32.18 × 65 =
33. 33.55 × 38 =
34. 34.6 × 55 =
35. 35.15 × 30 =
36. 36.55 × 6 =
37. 37.45 × 40 =
38. 38.125 × 16 =
39. 39.65 × 30 =
40. 40.28 × 25 =

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