Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 853 · 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. 1.55 × 24 =
2. 2.34 × 75 =
3. 3.25 × 12 =
4. 4.12 × 45 =
5. 5.12 × 25 =
6. 6.65 × 28 =
7. 7.35 × 22 =
8. 8.40 × 45 =
9. 9.45 × 24 =
10. 10.14 × 55 =
11. 11.14 × 75 =
12. 12.55 × 12 =
13. 13.20 × 125 =
14. 14.22 × 65 =
15. 15.12 × 125 =
16. 16.65 × 16 =
17. 17.30 × 45 =
18. 18.125 × 34 =
19. 19.14 × 55 =
20. 20.10 × 65 =
21. 21.15 × 36 =
22. 22.25 × 20 =
23. 23.25 × 40 =
24. 24.55 × 12 =
25. 25.125 × 22 =
26. 26.45 × 8 =
27. 27.55 × 22 =
28. 28.65 × 32 =
29. 29.30 × 125 =
30. 30.16 × 125 =
31. 31.12 × 55 =
32. 32.34 × 25 =
33. 33.8 × 75 =
34. 34.38 × 35 =
35. 35.6 × 45 =
36. 36.125 × 32 =
37. 37.55 × 24 =
38. 38.35 × 8 =
39. 39.65 × 16 =
40. 40.18 × 25 =

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