Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 142 · 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 × 38 =
2. 2.35 × 18 =
3. 3.125 × 34 =
4. 4.8 × 65 =
5. 5.55 × 10 =
6. 6.25 × 16 =
7. 7.55 × 20 =
8. 8.75 × 22 =
9. 9.35 × 40 =
10. 10.125 × 16 =
11. 11.20 × 35 =
12. 12.55 × 6 =
13. 13.26 × 35 =
14. 14.15 × 20 =
15. 15.65 × 32 =
16. 16.65 × 38 =
17. 17.125 × 16 =
18. 18.18 × 45 =
19. 19.25 × 16 =
20. 20.35 × 6 =
21. 21.40 × 45 =
22. 22.45 × 32 =
23. 23.75 × 20 =
24. 24.18 × 55 =
25. 25.14 × 75 =
26. 26.45 × 32 =
27. 27.12 × 45 =
28. 28.125 × 22 =
29. 29.32 × 55 =
30. 30.10 × 75 =
31. 31.34 × 25 =
32. 32.35 × 12 =
33. 33.20 × 65 =
34. 34.125 × 6 =
35. 35.15 × 34 =
36. 36.10 × 25 =
37. 37.65 × 40 =
38. 38.10 × 55 =
39. 39.55 × 32 =
40. 40.24 × 125 =

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