Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 950 · 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. 1.12 × 65 =
2. 2.125 × 12 =
3. 3.45 × 34 =
4. 4.8 × 125 =
5. 5.30 × 45 =
6. 6.12 × 25 =
7. 7.20 × 15 =
8. 8.28 × 15 =
9. 9.65 × 12 =
10. 10.12 × 35 =
11. 11.10 × 55 =
12. 12.25 × 22 =
13. 13.25 × 18 =
14. 14.32 × 125 =
15. 15.14 × 125 =
16. 16.15 × 6 =
17. 17.16 × 55 =
18. 18.18 × 25 =
19. 19.18 × 25 =
20. 20.35 × 36 =
21. 21.35 × 24 =
22. 22.75 × 36 =
23. 23.15 × 30 =
24. 24.45 × 32 =
25. 25.26 × 65 =
26. 26.16 × 35 =
27. 27.8 × 25 =
28. 28.32 × 45 =
29. 29.15 × 38 =
30. 30.6 × 35 =
31. 31.25 × 8 =
32. 32.45 × 16 =
33. 33.20 × 55 =
34. 34.35 × 26 =
35. 35.20 × 25 =
36. 36.18 × 55 =
37. 37.14 × 55 =
38. 38.65 × 24 =
39. 39.34 × 75 =
40. 40.55 × 38 =

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