Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 560 · 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. 1.25 × 16 =
2. 2.25 × 28 =
3. 3.22 × 65 =
4. 4.6 × 35 =
5. 5.75 × 6 =
6. 6.16 × 55 =
7. 7.36 × 45 =
8. 8.45 × 6 =
9. 9.125 × 38 =
10. 10.12 × 25 =
11. 11.10 × 35 =
12. 12.14 × 125 =
13. 13.125 × 10 =
14. 14.10 × 15 =
15. 15.16 × 55 =
16. 16.35 × 30 =
17. 17.25 × 26 =
18. 18.10 × 75 =
19. 19.25 × 20 =
20. 20.45 × 34 =
21. 21.55 × 22 =
22. 22.55 × 22 =
23. 23.40 × 75 =
24. 24.26 × 125 =
25. 25.16 × 65 =
26. 26.30 × 45 =
27. 27.36 × 65 =
28. 28.10 × 35 =
29. 29.30 × 25 =
30. 30.25 × 18 =
31. 31.34 × 15 =
32. 32.24 × 75 =
33. 33.30 × 15 =
34. 34.32 × 55 =
35. 35.45 × 16 =
36. 36.28 × 45 =
37. 37.125 × 20 =
38. 38.10 × 65 =
39. 39.75 × 38 =
40. 40.32 × 35 =

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