Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 954 · 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. 1.24 × 65 =
2. 2.55 × 28 =
3. 3.22 × 65 =
4. 4.55 × 40 =
5. 5.55 × 28 =
6. 6.34 × 75 =
7. 7.28 × 25 =
8. 8.32 × 55 =
9. 9.28 × 35 =
10. 10.65 × 26 =
11. 11.20 × 15 =
12. 12.25 × 16 =
13. 13.35 × 20 =
14. 14.25 × 18 =
15. 15.8 × 15 =
16. 16.65 × 8 =
17. 17.38 × 65 =
18. 18.6 × 25 =
19. 19.8 × 75 =
20. 20.35 × 6 =
21. 21.14 × 25 =
22. 22.125 × 12 =
23. 23.45 × 36 =
24. 24.10 × 75 =
25. 25.28 × 35 =
26. 26.8 × 25 =
27. 27.65 × 20 =
28. 28.15 × 14 =
29. 29.24 × 125 =
30. 30.25 × 38 =
31. 31.55 × 22 =
32. 32.75 × 30 =
33. 33.15 × 26 =
34. 34.125 × 16 =
35. 35.22 × 125 =
36. 36.45 × 8 =
37. 37.55 × 28 =
38. 38.55 × 22 =
39. 39.8 × 25 =
40. 40.125 × 24 =

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