Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 557 · 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. 2.12 × 55 =
3. 3.16 × 35 =
4. 4.25 × 34 =
5. 5.45 × 34 =
6. 6.55 × 32 =
7. 7.36 × 35 =
8. 8.45 × 40 =
9. 9.28 × 55 =
10. 10.28 × 25 =
11. 11.22 × 35 =
12. 12.38 × 75 =
13. 13.30 × 55 =
14. 14.6 × 65 =
15. 15.32 × 125 =
16. 16.25 × 34 =
17. 17.55 × 24 =
18. 18.10 × 35 =
19. 19.35 × 16 =
20. 20.35 × 8 =
21. 21.20 × 45 =
22. 22.26 × 125 =
23. 23.18 × 125 =
24. 24.30 × 25 =
25. 25.45 × 24 =
26. 26.35 × 36 =
27. 27.36 × 25 =
28. 28.45 × 40 =
29. 29.55 × 28 =
30. 30.34 × 75 =
31. 31.35 × 36 =
32. 32.30 × 75 =
33. 33.75 × 6 =
34. 34.10 × 65 =
35. 35.40 × 55 =
36. 36.45 × 12 =
37. 37.75 × 16 =
38. 38.65 × 20 =
39. 39.14 × 35 =
40. 40.24 × 45 =

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