Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 246 · 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. 1.25 × 40 =
2. 2.75 × 18 =
3. 3.35 × 26 =
4. 4.6 × 15 =
5. 5.75 × 34 =
6. 6.10 × 75 =
7. 7.28 × 15 =
8. 8.16 × 65 =
9. 9.45 × 14 =
10. 10.10 × 75 =
11. 11.30 × 15 =
12. 12.32 × 35 =
13. 13.32 × 15 =
14. 14.12 × 15 =
15. 15.45 × 12 =
16. 16.32 × 35 =
17. 17.6 × 75 =
18. 18.25 × 28 =
19. 19.16 × 15 =
20. 20.18 × 45 =
21. 21.15 × 8 =
22. 22.35 × 34 =
23. 23.35 × 38 =
24. 24.30 × 15 =
25. 25.15 × 30 =
26. 26.20 × 15 =
27. 27.75 × 20 =
28. 28.18 × 65 =
29. 29.65 × 36 =
30. 30.6 × 125 =
31. 31.15 × 30 =
32. 32.65 × 14 =
33. 33.75 × 20 =
34. 34.6 × 25 =
35. 35.15 × 10 =
36. 36.65 × 20 =
37. 37.65 × 10 =
38. 38.34 × 55 =
39. 39.40 × 55 =
40. 40.12 × 65 =

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