Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 498 · 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. 1.18 × 65 =
2. 2.45 × 12 =
3. 3.38 × 55 =
4. 4.26 × 125 =
5. 5.25 × 40 =
6. 6.20 × 25 =
7. 7.24 × 75 =
8. 8.24 × 35 =
9. 9.30 × 65 =
10. 10.25 × 38 =
11. 11.25 × 12 =
12. 12.28 × 25 =
13. 13.75 × 34 =
14. 14.14 × 65 =
15. 15.125 × 18 =
16. 16.25 × 16 =
17. 17.12 × 65 =
18. 18.25 × 40 =
19. 19.38 × 125 =
20. 20.35 × 24 =
21. 21.75 × 36 =
22. 22.45 × 22 =
23. 23.25 × 16 =
24. 24.28 × 125 =
25. 25.8 × 55 =
26. 26.25 × 36 =
27. 27.24 × 75 =
28. 28.35 × 12 =
29. 29.16 × 65 =
30. 30.45 × 36 =
31. 31.125 × 40 =
32. 32.65 × 30 =
33. 33.25 × 28 =
34. 34.38 × 45 =
35. 35.125 × 22 =
36. 36.45 × 38 =
37. 37.15 × 8 =
38. 38.16 × 25 =
39. 39.26 × 65 =
40. 40.125 × 32 =

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