Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 570 · 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. 1.8 × 75 =
2. 2.10 × 35 =
3. 3.20 × 35 =
4. 4.65 × 22 =
5. 5.25 × 38 =
6. 6.125 × 38 =
7. 7.75 × 30 =
8. 8.30 × 25 =
9. 9.14 × 15 =
10. 10.12 × 35 =
11. 11.26 × 15 =
12. 12.32 × 35 =
13. 13.8 × 15 =
14. 14.35 × 14 =
15. 15.75 × 34 =
16. 16.14 × 45 =
17. 17.30 × 45 =
18. 18.30 × 55 =
19. 19.10 × 35 =
20. 20.6 × 125 =
21. 21.6 × 25 =
22. 22.38 × 15 =
23. 23.36 × 55 =
24. 24.15 × 34 =
25. 25.15 × 30 =
26. 26.45 × 34 =
27. 27.20 × 25 =
28. 28.15 × 14 =
29. 29.65 × 20 =
30. 30.22 × 35 =
31. 31.16 × 55 =
32. 32.26 × 15 =
33. 33.28 × 15 =
34. 34.25 × 30 =
35. 35.28 × 25 =
36. 36.32 × 75 =
37. 37.38 × 75 =
38. 38.15 × 38 =
39. 39.65 × 12 =
40. 40.25 × 8 =

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