Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 565 · 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. 1.34 × 75 =
2. 2.55 × 20 =
3. 3.75 × 20 =
4. 4.45 × 8 =
5. 5.45 × 22 =
6. 6.75 × 34 =
7. 7.10 × 55 =
8. 8.26 × 65 =
9. 9.45 × 20 =
10. 10.16 × 45 =
11. 11.25 × 22 =
12. 12.28 × 45 =
13. 13.55 × 30 =
14. 14.55 × 24 =
15. 15.34 × 15 =
16. 16.25 × 36 =
17. 17.16 × 65 =
18. 18.65 × 10 =
19. 19.65 × 38 =
20. 20.10 × 25 =
21. 21.125 × 30 =
22. 22.16 × 55 =
23. 23.55 × 24 =
24. 24.25 × 18 =
25. 25.35 × 36 =
26. 26.16 × 25 =
27. 27.45 × 36 =
28. 28.65 × 18 =
29. 29.75 × 36 =
30. 30.10 × 45 =
31. 31.36 × 65 =
32. 32.45 × 16 =
33. 33.38 × 65 =
34. 34.16 × 75 =
35. 35.35 × 40 =
36. 36.15 × 34 =
37. 37.8 × 25 =
38. 38.18 × 45 =
39. 39.40 × 35 =
40. 40.35 × 40 =

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