Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 704 · 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. 1.75 × 32 =
2. 2.25 × 16 =
3. 3.10 × 45 =
4. 4.15 × 24 =
5. 5.15 × 20 =
6. 6.45 × 40 =
7. 7.40 × 65 =
8. 8.38 × 45 =
9. 9.15 × 22 =
10. 10.32 × 65 =
11. 11.35 × 28 =
12. 12.45 × 38 =
13. 13.125 × 6 =
14. 14.35 × 8 =
15. 15.125 × 28 =
16. 16.35 × 6 =
17. 17.25 × 16 =
18. 18.24 × 45 =
19. 19.35 × 36 =
20. 20.30 × 75 =
21. 21.125 × 22 =
22. 22.8 × 35 =
23. 23.15 × 18 =
24. 24.45 × 26 =
25. 25.34 × 25 =
26. 26.75 × 10 =
27. 27.35 × 26 =
28. 28.65 × 8 =
29. 29.125 × 36 =
30. 30.55 × 38 =
31. 31.34 × 25 =
32. 32.24 × 45 =
33. 33.65 × 16 =
34. 34.125 × 14 =
35. 35.25 × 18 =
36. 36.26 × 45 =
37. 37.14 × 125 =
38. 38.32 × 15 =
39. 39.8 × 45 =
40. 40.75 × 30 =

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