Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 178 · 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 × 26 =
2. 2.20 × 35 =
3. 3.10 × 15 =
4. 4.15 × 36 =
5. 5.45 × 40 =
6. 6.75 × 32 =
7. 7.45 × 24 =
8. 8.25 × 16 =
9. 9.55 × 38 =
10. 10.6 × 65 =
11. 11.125 × 36 =
12. 12.30 × 35 =
13. 13.12 × 15 =
14. 14.45 × 36 =
15. 15.26 × 45 =
16. 16.26 × 45 =
17. 17.32 × 65 =
18. 18.65 × 30 =
19. 19.40 × 15 =
20. 20.10 × 55 =
21. 21.25 × 10 =
22. 22.25 × 6 =
23. 23.55 × 22 =
24. 24.14 × 25 =
25. 25.15 × 12 =
26. 26.15 × 10 =
27. 27.10 × 25 =
28. 28.14 × 35 =
29. 29.28 × 15 =
30. 30.8 × 35 =
31. 31.45 × 32 =
32. 32.15 × 16 =
33. 33.20 × 25 =
34. 34.14 × 25 =
35. 35.14 × 25 =
36. 36.25 × 8 =
37. 37.45 × 16 =
38. 38.55 × 30 =
39. 39.125 × 6 =
40. 40.16 × 15 =

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