Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 478 · 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. 1.26 × 55 =
2. 2.40 × 125 =
3. 3.40 × 45 =
4. 4.30 × 15 =
5. 5.75 × 6 =
6. 6.32 × 65 =
7. 7.40 × 35 =
8. 8.15 × 10 =
9. 9.35 × 24 =
10. 10.25 × 36 =
11. 11.35 × 6 =
12. 12.20 × 55 =
13. 13.55 × 26 =
14. 14.20 × 65 =
15. 15.32 × 35 =
16. 16.55 × 6 =
17. 17.25 × 16 =
18. 18.125 × 40 =
19. 19.25 × 16 =
20. 20.25 × 18 =
21. 21.18 × 35 =
22. 22.34 × 65 =
23. 23.38 × 45 =
24. 24.8 × 55 =
25. 25.75 × 24 =
26. 26.75 × 38 =
27. 27.75 × 28 =
28. 28.30 × 75 =
29. 29.40 × 55 =
30. 30.15 × 16 =
31. 31.35 × 38 =
32. 32.16 × 75 =
33. 33.15 × 6 =
34. 34.32 × 65 =
35. 35.36 × 35 =
36. 36.15 × 38 =
37. 37.75 × 8 =
38. 38.14 × 125 =
39. 39.45 × 12 =
40. 40.14 × 45 =

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