Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 395 · 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. 1.125 × 36 =
2. 2.15 × 18 =
3. 3.18 × 25 =
4. 4.65 × 16 =
5. 5.55 × 40 =
6. 6.75 × 28 =
7. 7.16 × 25 =
8. 8.55 × 8 =
9. 9.25 × 34 =
10. 10.18 × 125 =
11. 11.75 × 36 =
12. 12.25 × 24 =
13. 13.40 × 75 =
14. 14.45 × 6 =
15. 15.45 × 16 =
16. 16.45 × 32 =
17. 17.20 × 125 =
18. 18.75 × 10 =
19. 19.55 × 18 =
20. 20.25 × 28 =
21. 21.35 × 40 =
22. 22.8 × 65 =
23. 23.10 × 125 =
24. 24.32 × 55 =
25. 25.12 × 25 =
26. 26.25 × 32 =
27. 27.55 × 20 =
28. 28.22 × 125 =
29. 29.65 × 34 =
30. 30.35 × 32 =
31. 31.30 × 55 =
32. 32.18 × 125 =
33. 33.75 × 30 =
34. 34.24 × 65 =
35. 35.8 × 15 =
36. 36.65 × 22 =
37. 37.55 × 36 =
38. 38.65 × 28 =
39. 39.15 × 10 =
40. 40.8 × 65 =

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