Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 157 · 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. 1.26 × 15 =
2. 2.25 × 40 =
3. 3.28 × 75 =
4. 4.35 × 18 =
5. 5.26 × 45 =
6. 6.15 × 26 =
7. 7.45 × 12 =
8. 8.16 × 65 =
9. 9.55 × 6 =
10. 10.8 × 125 =
11. 11.15 × 8 =
12. 12.12 × 15 =
13. 13.75 × 20 =
14. 14.20 × 75 =
15. 15.38 × 65 =
16. 16.18 × 65 =
17. 17.40 × 55 =
18. 18.15 × 32 =
19. 19.10 × 55 =
20. 20.45 × 10 =
21. 21.55 × 12 =
22. 22.35 × 36 =
23. 23.125 × 22 =
24. 24.36 × 15 =
25. 25.35 × 26 =
26. 26.25 × 28 =
27. 27.45 × 38 =
28. 28.36 × 125 =
29. 29.25 × 38 =
30. 30.22 × 125 =
31. 31.15 × 14 =
32. 32.30 × 45 =
33. 33.35 × 26 =
34. 34.28 × 75 =
35. 35.16 × 65 =
36. 36.25 × 32 =
37. 37.125 × 14 =
38. 38.25 × 26 =
39. 39.75 × 16 =
40. 40.14 × 55 =

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