Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 247 · 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. 1.36 × 15 =
2. 2.15 × 32 =
3. 3.35 × 34 =
4. 4.125 × 18 =
5. 5.24 × 75 =
6. 6.36 × 75 =
7. 7.45 × 24 =
8. 8.25 × 6 =
9. 9.28 × 125 =
10. 10.22 × 15 =
11. 11.25 × 38 =
12. 12.18 × 125 =
13. 13.45 × 16 =
14. 14.75 × 32 =
15. 15.8 × 35 =
16. 16.35 × 16 =
17. 17.75 × 6 =
18. 18.25 × 18 =
19. 19.22 × 15 =
20. 20.32 × 45 =
21. 21.18 × 45 =
22. 22.20 × 55 =
23. 23.30 × 55 =
24. 24.55 × 24 =
25. 25.14 × 65 =
26. 26.15 × 32 =
27. 27.24 × 15 =
28. 28.15 × 18 =
29. 29.6 × 55 =
30. 30.35 × 32 =
31. 31.12 × 15 =
32. 32.15 × 34 =
33. 33.15 × 26 =
34. 34.38 × 55 =
35. 35.10 × 45 =
36. 36.45 × 32 =
37. 37.55 × 14 =
38. 38.65 × 20 =
39. 39.26 × 35 =
40. 40.12 × 55 =

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