Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 904 · 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 × 14 =
2. 2.10 × 35 =
3. 3.35 × 8 =
4. 4.15 × 28 =
5. 5.15 × 30 =
6. 6.25 × 36 =
7. 7.35 × 38 =
8. 8.35 × 40 =
9. 9.65 × 26 =
10. 10.45 × 28 =
11. 11.18 × 65 =
12. 12.15 × 6 =
13. 13.15 × 40 =
14. 14.40 × 25 =
15. 15.38 × 15 =
16. 16.75 × 34 =
17. 17.16 × 55 =
18. 18.15 × 10 =
19. 19.15 × 32 =
20. 20.30 × 35 =
21. 21.125 × 38 =
22. 22.8 × 35 =
23. 23.38 × 15 =
24. 24.8 × 75 =
25. 25.45 × 10 =
26. 26.25 × 32 =
27. 27.22 × 65 =
28. 28.36 × 15 =
29. 29.45 × 22 =
30. 30.14 × 125 =
31. 31.35 × 12 =
32. 32.45 × 36 =
33. 33.6 × 55 =
34. 34.8 × 45 =
35. 35.65 × 26 =
36. 36.22 × 35 =
37. 37.75 × 6 =
38. 38.14 × 25 =
39. 39.14 × 45 =
40. 40.14 × 45 =

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