Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 357 · 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. 1.55 × 8 =
2. 2.15 × 14 =
3. 3.20 × 75 =
4. 4.24 × 55 =
5. 5.14 × 65 =
6. 6.20 × 35 =
7. 7.35 × 16 =
8. 8.25 × 24 =
9. 9.35 × 16 =
10. 10.55 × 6 =
11. 11.28 × 75 =
12. 12.15 × 18 =
13. 13.34 × 25 =
14. 14.65 × 10 =
15. 15.65 × 26 =
16. 16.45 × 14 =
17. 17.125 × 34 =
18. 18.12 × 35 =
19. 19.45 × 22 =
20. 20.15 × 26 =
21. 21.12 × 25 =
22. 22.75 × 10 =
23. 23.55 × 36 =
24. 24.12 × 45 =
25. 25.24 × 45 =
26. 26.6 × 55 =
27. 27.10 × 15 =
28. 28.125 × 16 =
29. 29.12 × 15 =
30. 30.10 × 15 =
31. 31.10 × 75 =
32. 32.8 × 55 =
33. 33.25 × 18 =
34. 34.34 × 65 =
35. 35.15 × 6 =
36. 36.15 × 32 =
37. 37.35 × 30 =
38. 38.45 × 10 =
39. 39.65 × 16 =
40. 40.55 × 10 =

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