Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 966 · 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. 1.14 × 55 =
2. 2.15 × 26 =
3. 3.38 × 65 =
4. 4.65 × 10 =
5. 5.35 × 8 =
6. 6.8 × 65 =
7. 7.38 × 35 =
8. 8.125 × 6 =
9. 9.35 × 34 =
10. 10.26 × 25 =
11. 11.55 × 14 =
12. 12.16 × 45 =
13. 13.15 × 22 =
14. 14.25 × 24 =
15. 15.55 × 14 =
16. 16.24 × 75 =
17. 17.65 × 20 =
18. 18.14 × 125 =
19. 19.32 × 45 =
20. 20.35 × 16 =
21. 21.22 × 15 =
22. 22.25 × 22 =
23. 23.28 × 75 =
24. 24.65 × 28 =
25. 25.40 × 45 =
26. 26.65 × 40 =
27. 27.65 × 12 =
28. 28.14 × 35 =
29. 29.15 × 8 =
30. 30.15 × 30 =
31. 31.65 × 36 =
32. 32.18 × 25 =
33. 33.40 × 25 =
34. 34.15 × 10 =
35. 35.25 × 10 =
36. 36.18 × 75 =
37. 37.18 × 65 =
38. 38.26 × 15 =
39. 39.25 × 8 =
40. 40.32 × 15 =

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