Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 226 · 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 × 22 =
2. 2.25 × 16 =
3. 3.125 × 18 =
4. 4.35 × 22 =
5. 5.55 × 26 =
6. 6.28 × 25 =
7. 7.30 × 45 =
8. 8.12 × 45 =
9. 9.15 × 6 =
10. 10.15 × 26 =
11. 11.35 × 10 =
12. 12.35 × 32 =
13. 13.38 × 45 =
14. 14.75 × 18 =
15. 15.75 × 38 =
16. 16.22 × 15 =
17. 17.22 × 75 =
18. 18.35 × 22 =
19. 19.40 × 15 =
20. 20.55 × 28 =
21. 21.75 × 14 =
22. 22.34 × 55 =
23. 23.55 × 24 =
24. 24.65 × 24 =
25. 25.25 × 12 =
26. 26.15 × 36 =
27. 27.65 × 6 =
28. 28.75 × 32 =
29. 29.18 × 35 =
30. 30.45 × 30 =
31. 31.55 × 22 =
32. 32.14 × 15 =
33. 33.20 × 65 =
34. 34.45 × 28 =
35. 35.25 × 30 =
36. 36.40 × 35 =
37. 37.65 × 14 =
38. 38.45 × 36 =
39. 39.26 × 35 =
40. 40.32 × 65 =

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