Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 221 · 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 × 26 =
2. 2.55 × 22 =
3. 3.75 × 20 =
4. 4.75 × 36 =
5. 5.10 × 45 =
6. 6.35 × 38 =
7. 7.35 × 24 =
8. 8.45 × 10 =
9. 9.45 × 20 =
10. 10.8 × 125 =
11. 11.18 × 25 =
12. 12.35 × 6 =
13. 13.25 × 40 =
14. 14.18 × 125 =
15. 15.65 × 24 =
16. 16.15 × 18 =
17. 17.36 × 45 =
18. 18.34 × 125 =
19. 19.35 × 32 =
20. 20.55 × 36 =
21. 21.10 × 75 =
22. 22.35 × 26 =
23. 23.26 × 55 =
24. 24.18 × 35 =
25. 25.30 × 125 =
26. 26.45 × 24 =
27. 27.10 × 35 =
28. 28.25 × 10 =
29. 29.40 × 75 =
30. 30.8 × 25 =
31. 31.38 × 45 =
32. 32.55 × 10 =
33. 33.8 × 35 =
34. 34.75 × 10 =
35. 35.28 × 55 =
36. 36.25 × 30 =
37. 37.25 × 14 =
38. 38.75 × 20 =
39. 39.65 × 22 =
40. 40.55 × 12 =

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