Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 149 · 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. 1.35 × 22 =
2. 2.10 × 35 =
3. 3.32 × 25 =
4. 4.26 × 125 =
5. 5.65 × 8 =
6. 6.45 × 30 =
7. 7.45 × 24 =
8. 8.24 × 125 =
9. 9.14 × 25 =
10. 10.34 × 125 =
11. 11.32 × 45 =
12. 12.25 × 34 =
13. 13.36 × 15 =
14. 14.26 × 45 =
15. 15.65 × 18 =
16. 16.35 × 20 =
17. 17.36 × 65 =
18. 18.18 × 45 =
19. 19.65 × 22 =
20. 20.30 × 55 =
21. 21.15 × 18 =
22. 22.75 × 18 =
23. 23.25 × 28 =
24. 24.75 × 10 =
25. 25.125 × 6 =
26. 26.6 × 45 =
27. 27.14 × 15 =
28. 28.75 × 20 =
29. 29.12 × 55 =
30. 30.65 × 22 =
31. 31.22 × 65 =
32. 32.8 × 25 =
33. 33.18 × 55 =
34. 34.14 × 65 =
35. 35.34 × 35 =
36. 36.45 × 32 =
37. 37.26 × 15 =
38. 38.125 × 36 =
39. 39.75 × 20 =
40. 40.14 × 55 =

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