Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 775 · 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. 1.14 × 75 =
2. 2.8 × 45 =
3. 3.38 × 55 =
4. 4.20 × 15 =
5. 5.55 × 40 =
6. 6.25 × 24 =
7. 7.15 × 8 =
8. 8.55 × 34 =
9. 9.65 × 34 =
10. 10.36 × 75 =
11. 11.30 × 25 =
12. 12.24 × 65 =
13. 13.15 × 32 =
14. 14.34 × 45 =
15. 15.15 × 10 =
16. 16.40 × 15 =
17. 17.6 × 55 =
18. 18.75 × 22 =
19. 19.25 × 26 =
20. 20.15 × 36 =
21. 21.125 × 40 =
22. 22.28 × 125 =
23. 23.25 × 20 =
24. 24.38 × 55 =
25. 25.35 × 32 =
26. 26.20 × 35 =
27. 27.25 × 38 =
28. 28.65 × 38 =
29. 29.65 × 18 =
30. 30.65 × 10 =
31. 31.15 × 28 =
32. 32.38 × 35 =
33. 33.65 × 30 =
34. 34.10 × 55 =
35. 35.15 × 30 =
36. 36.125 × 22 =
37. 37.125 × 28 =
38. 38.15 × 18 =
39. 39.10 × 75 =
40. 40.16 × 65 =

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