Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 822 · 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 × 16 =
2. 2.75 × 6 =
3. 3.75 × 24 =
4. 4.65 × 6 =
5. 5.8 × 15 =
6. 6.15 × 36 =
7. 7.25 × 30 =
8. 8.65 × 36 =
9. 9.15 × 14 =
10. 10.65 × 22 =
11. 11.26 × 35 =
12. 12.55 × 26 =
13. 13.28 × 75 =
14. 14.125 × 26 =
15. 15.125 × 24 =
16. 16.10 × 45 =
17. 17.28 × 125 =
18. 18.26 × 125 =
19. 19.40 × 125 =
20. 20.26 × 125 =
21. 21.10 × 15 =
22. 22.16 × 25 =
23. 23.35 × 32 =
24. 24.14 × 15 =
25. 25.65 × 14 =
26. 26.24 × 75 =
27. 27.6 × 125 =
28. 28.14 × 65 =
29. 29.75 × 18 =
30. 30.65 × 32 =
31. 31.45 × 36 =
32. 32.38 × 25 =
33. 33.32 × 45 =
34. 34.14 × 125 =
35. 35.55 × 40 =
36. 36.16 × 75 =
37. 37.32 × 35 =
38. 38.10 × 35 =
39. 39.25 × 8 =
40. 40.30 × 55 =

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