Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 306 · 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. 1.35 × 10 =
2. 2.22 × 125 =
3. 3.15 × 12 =
4. 4.75 × 26 =
5. 5.24 × 125 =
6. 6.45 × 6 =
7. 7.15 × 22 =
8. 8.12 × 65 =
9. 9.125 × 26 =
10. 10.25 × 16 =
11. 11.125 × 22 =
12. 12.75 × 14 =
13. 13.75 × 34 =
14. 14.15 × 26 =
15. 15.25 × 16 =
16. 16.16 × 35 =
17. 17.55 × 12 =
18. 18.75 × 34 =
19. 19.15 × 28 =
20. 20.40 × 25 =
21. 21.8 × 25 =
22. 22.22 × 25 =
23. 23.65 × 32 =
24. 24.65 × 8 =
25. 25.18 × 15 =
26. 26.12 × 45 =
27. 27.75 × 6 =
28. 28.6 × 35 =
29. 29.38 × 15 =
30. 30.12 × 75 =
31. 31.35 × 26 =
32. 32.10 × 55 =
33. 33.65 × 38 =
34. 34.35 × 12 =
35. 35.25 × 32 =
36. 36.24 × 55 =
37. 37.55 × 14 =
38. 38.22 × 125 =
39. 39.15 × 22 =
40. 40.65 × 16 =

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