Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 355 · 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. 1.22 × 35 =
2. 2.55 × 20 =
3. 3.35 × 12 =
4. 4.25 × 36 =
5. 5.75 × 20 =
6. 6.35 × 12 =
7. 7.28 × 15 =
8. 8.25 × 8 =
9. 9.65 × 6 =
10. 10.35 × 34 =
11. 11.45 × 30 =
12. 12.125 × 20 =
13. 13.20 × 65 =
14. 14.35 × 34 =
15. 15.75 × 38 =
16. 16.15 × 14 =
17. 17.35 × 16 =
18. 18.40 × 25 =
19. 19.35 × 18 =
20. 20.30 × 45 =
21. 21.20 × 75 =
22. 22.35 × 14 =
23. 23.55 × 14 =
24. 24.16 × 65 =
25. 25.45 × 10 =
26. 26.15 × 10 =
27. 27.36 × 35 =
28. 28.12 × 25 =
29. 29.55 × 22 =
30. 30.35 × 34 =
31. 31.45 × 14 =
32. 32.30 × 65 =
33. 33.15 × 28 =
34. 34.18 × 75 =
35. 35.125 × 16 =
36. 36.6 × 125 =
37. 37.35 × 10 =
38. 38.12 × 45 =
39. 39.35 × 38 =
40. 40.38 × 75 =

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