Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 907 · 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. 1.22 × 125 =
2. 2.32 × 55 =
3. 3.18 × 65 =
4. 4.55 × 26 =
5. 5.45 × 40 =
6. 6.14 × 65 =
7. 7.22 × 15 =
8. 8.14 × 25 =
9. 9.20 × 125 =
10. 10.32 × 35 =
11. 11.8 × 75 =
12. 12.125 × 18 =
13. 13.38 × 45 =
14. 14.16 × 35 =
15. 15.35 × 18 =
16. 16.55 × 34 =
17. 17.26 × 35 =
18. 18.15 × 12 =
19. 19.35 × 22 =
20. 20.30 × 25 =
21. 21.125 × 34 =
22. 22.8 × 15 =
23. 23.22 × 75 =
24. 24.30 × 25 =
25. 25.14 × 125 =
26. 26.36 × 125 =
27. 27.55 × 24 =
28. 28.45 × 40 =
29. 29.14 × 75 =
30. 30.10 × 55 =
31. 31.55 × 26 =
32. 32.34 × 125 =
33. 33.22 × 35 =
34. 34.26 × 125 =
35. 35.75 × 14 =
36. 36.6 × 35 =
37. 37.25 × 28 =
38. 38.10 × 55 =
39. 39.65 × 28 =
40. 40.32 × 125 =

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