Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 406 · 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 × 40 =
2. 2.15 × 8 =
3. 3.55 × 14 =
4. 4.24 × 25 =
5. 5.65 × 8 =
6. 6.22 × 25 =
7. 7.36 × 65 =
8. 8.15 × 12 =
9. 9.45 × 34 =
10. 10.25 × 40 =
11. 11.45 × 40 =
12. 12.40 × 45 =
13. 13.30 × 15 =
14. 14.34 × 75 =
15. 15.55 × 34 =
16. 16.16 × 15 =
17. 17.30 × 35 =
18. 18.36 × 125 =
19. 19.30 × 75 =
20. 20.25 × 38 =
21. 21.8 × 75 =
22. 22.14 × 125 =
23. 23.15 × 36 =
24. 24.35 × 10 =
25. 25.35 × 16 =
26. 26.28 × 25 =
27. 27.40 × 45 =
28. 28.30 × 45 =
29. 29.35 × 28 =
30. 30.10 × 125 =
31. 31.14 × 25 =
32. 32.25 × 40 =
33. 33.55 × 40 =
34. 34.45 × 34 =
35. 35.20 × 75 =
36. 36.65 × 40 =
37. 37.45 × 36 =
38. 38.45 × 14 =
39. 39.34 × 75 =
40. 40.26 × 35 =

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