Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 204 · 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 × 28 =
2. 2.36 × 55 =
3. 3.35 × 30 =
4. 4.32 × 15 =
5. 5.65 × 18 =
6. 6.65 × 12 =
7. 7.10 × 15 =
8. 8.14 × 15 =
9. 9.45 × 26 =
10. 10.25 × 14 =
11. 11.75 × 24 =
12. 12.16 × 65 =
13. 13.75 × 6 =
14. 14.38 × 125 =
15. 15.25 × 14 =
16. 16.36 × 75 =
17. 17.18 × 75 =
18. 18.45 × 30 =
19. 19.30 × 45 =
20. 20.40 × 25 =
21. 21.10 × 75 =
22. 22.55 × 28 =
23. 23.25 × 26 =
24. 24.15 × 24 =
25. 25.25 × 38 =
26. 26.65 × 20 =
27. 27.38 × 55 =
28. 28.15 × 34 =
29. 29.45 × 12 =
30. 30.25 × 14 =
31. 31.75 × 18 =
32. 32.32 × 125 =
33. 33.38 × 35 =
34. 34.18 × 65 =
35. 35.18 × 25 =
36. 36.125 × 8 =
37. 37.45 × 36 =
38. 38.65 × 6 =
39. 39.30 × 45 =
40. 40.28 × 35 =

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