Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 624 · 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. 1.16 × 65 =
2. 2.25 × 32 =
3. 3.18 × 35 =
4. 4.36 × 25 =
5. 5.65 × 6 =
6. 6.18 × 15 =
7. 7.45 × 30 =
8. 8.32 × 45 =
9. 9.12 × 25 =
10. 10.36 × 55 =
11. 11.28 × 55 =
12. 12.65 × 16 =
13. 13.6 × 65 =
14. 14.8 × 65 =
15. 15.25 × 26 =
16. 16.15 × 36 =
17. 17.16 × 35 =
18. 18.32 × 25 =
19. 19.125 × 14 =
20. 20.45 × 16 =
21. 21.38 × 75 =
22. 22.25 × 22 =
23. 23.16 × 125 =
24. 24.45 × 20 =
25. 25.75 × 30 =
26. 26.24 × 45 =
27. 27.38 × 45 =
28. 28.16 × 15 =
29. 29.15 × 10 =
30. 30.20 × 125 =
31. 31.10 × 25 =
32. 32.15 × 8 =
33. 33.75 × 8 =
34. 34.75 × 30 =
35. 35.8 × 35 =
36. 36.12 × 15 =
37. 37.28 × 25 =
38. 38.75 × 30 =
39. 39.38 × 55 =
40. 40.12 × 15 =

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