Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 750 · 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. 1.125 × 22 =
2. 2.16 × 25 =
3. 3.14 × 15 =
4. 4.15 × 34 =
5. 5.20 × 65 =
6. 6.22 × 45 =
7. 7.10 × 65 =
8. 8.30 × 25 =
9. 9.45 × 38 =
10. 10.55 × 24 =
11. 11.30 × 125 =
12. 12.45 × 30 =
13. 13.30 × 25 =
14. 14.22 × 25 =
15. 15.65 × 40 =
16. 16.45 × 26 =
17. 17.32 × 75 =
18. 18.30 × 55 =
19. 19.65 × 28 =
20. 20.30 × 55 =
21. 21.25 × 30 =
22. 22.35 × 22 =
23. 23.65 × 20 =
24. 24.15 × 24 =
25. 25.26 × 65 =
26. 26.34 × 125 =
27. 27.8 × 75 =
28. 28.125 × 38 =
29. 29.45 × 26 =
30. 30.6 × 65 =
31. 31.45 × 12 =
32. 32.30 × 35 =
33. 33.14 × 75 =
34. 34.45 × 28 =
35. 35.30 × 55 =
36. 36.22 × 55 =
37. 37.35 × 28 =
38. 38.6 × 75 =
39. 39.10 × 75 =
40. 40.20 × 75 =

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