Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 266 · 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. 1.15 × 18 =
2. 2.35 × 8 =
3. 3.35 × 24 =
4. 4.65 × 24 =
5. 5.24 × 125 =
6. 6.15 × 38 =
7. 7.32 × 25 =
8. 8.65 × 34 =
9. 9.25 × 14 =
10. 10.45 × 28 =
11. 11.6 × 45 =
12. 12.35 × 22 =
13. 13.25 × 14 =
14. 14.6 × 15 =
15. 15.6 × 125 =
16. 16.15 × 6 =
17. 17.32 × 25 =
18. 18.125 × 26 =
19. 19.32 × 25 =
20. 20.45 × 22 =
21. 21.65 × 24 =
22. 22.25 × 24 =
23. 23.34 × 75 =
24. 24.65 × 24 =
25. 25.75 × 22 =
26. 26.38 × 55 =
27. 27.15 × 18 =
28. 28.16 × 65 =
29. 29.18 × 25 =
30. 30.38 × 15 =
31. 31.24 × 45 =
32. 32.75 × 32 =
33. 33.26 × 15 =
34. 34.75 × 36 =
35. 35.28 × 65 =
36. 36.125 × 34 =
37. 37.40 × 45 =
38. 38.35 × 24 =
39. 39.40 × 125 =
40. 40.125 × 6 =

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