Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 605 · 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 × 16 =
2. 2.65 × 24 =
3. 3.28 × 45 =
4. 4.36 × 35 =
5. 5.65 × 30 =
6. 6.22 × 125 =
7. 7.30 × 45 =
8. 8.36 × 15 =
9. 9.15 × 8 =
10. 10.35 × 22 =
11. 11.20 × 75 =
12. 12.25 × 12 =
13. 13.20 × 125 =
14. 14.65 × 38 =
15. 15.15 × 36 =
16. 16.20 × 65 =
17. 17.75 × 30 =
18. 18.12 × 55 =
19. 19.65 × 24 =
20. 20.24 × 25 =
21. 21.24 × 65 =
22. 22.75 × 34 =
23. 23.8 × 65 =
24. 24.65 × 6 =
25. 25.35 × 36 =
26. 26.36 × 65 =
27. 27.25 × 30 =
28. 28.14 × 15 =
29. 29.45 × 10 =
30. 30.12 × 15 =
31. 31.65 × 18 =
32. 32.45 × 36 =
33. 33.22 × 125 =
34. 34.38 × 65 =
35. 35.15 × 28 =
36. 36.20 × 35 =
37. 37.15 × 6 =
38. 38.75 × 16 =
39. 39.35 × 36 =
40. 40.18 × 45 =

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