Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 272 · 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. 1.15 × 28 =
2. 2.75 × 10 =
3. 3.25 × 6 =
4. 4.15 × 6 =
5. 5.30 × 75 =
6. 6.55 × 26 =
7. 7.34 × 125 =
8. 8.14 × 75 =
9. 9.55 × 8 =
10. 10.65 × 14 =
11. 11.16 × 25 =
12. 12.25 × 36 =
13. 13.28 × 75 =
14. 14.55 × 16 =
15. 15.75 × 22 =
16. 16.15 × 12 =
17. 17.30 × 125 =
18. 18.18 × 45 =
19. 19.125 × 18 =
20. 20.35 × 10 =
21. 21.35 × 18 =
22. 22.16 × 65 =
23. 23.26 × 125 =
24. 24.45 × 40 =
25. 25.24 × 45 =
26. 26.65 × 28 =
27. 27.22 × 55 =
28. 28.28 × 25 =
29. 29.65 × 6 =
30. 30.32 × 65 =
31. 31.55 × 32 =
32. 32.34 × 15 =
33. 33.25 × 18 =
34. 34.14 × 125 =
35. 35.35 × 8 =
36. 36.15 × 30 =
37. 37.25 × 40 =
38. 38.35 × 24 =
39. 39.15 × 16 =
40. 40.24 × 25 =

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