Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 72 · 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. 1.12 × 125 =
2. 2.15 × 36 =
3. 3.25 × 38 =
4. 4.24 × 25 =
5. 5.15 × 34 =
6. 6.14 × 25 =
7. 7.25 × 12 =
8. 8.25 × 16 =
9. 9.65 × 14 =
10. 10.8 × 15 =
11. 11.38 × 15 =
12. 12.15 × 26 =
13. 13.6 × 45 =
14. 14.25 × 14 =
15. 15.18 × 75 =
16. 16.55 × 22 =
17. 17.28 × 15 =
18. 18.12 × 35 =
19. 19.36 × 35 =
20. 20.25 × 8 =
21. 21.55 × 14 =
22. 22.125 × 36 =
23. 23.35 × 14 =
24. 24.28 × 35 =
25. 25.16 × 65 =
26. 26.25 × 8 =
27. 27.35 × 16 =
28. 28.125 × 30 =
29. 29.16 × 35 =
30. 30.18 × 65 =
31. 31.6 × 45 =
32. 32.35 × 40 =
33. 33.32 × 35 =
34. 34.125 × 16 =
35. 35.55 × 8 =
36. 36.6 × 45 =
37. 37.22 × 35 =
38. 38.25 × 8 =
39. 39.40 × 45 =
40. 40.125 × 34 =

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