Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 763 · 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. 1.14 × 35 =
2. 2.12 × 75 =
3. 3.12 × 125 =
4. 4.75 × 20 =
5. 5.65 × 26 =
6. 6.36 × 15 =
7. 7.45 × 14 =
8. 8.15 × 40 =
9. 9.35 × 40 =
10. 10.65 × 38 =
11. 11.35 × 6 =
12. 12.25 × 28 =
13. 13.45 × 10 =
14. 14.16 × 55 =
15. 15.18 × 45 =
16. 16.28 × 35 =
17. 17.36 × 35 =
18. 18.125 × 6 =
19. 19.18 × 55 =
20. 20.65 × 20 =
21. 21.15 × 34 =
22. 22.15 × 40 =
23. 23.25 × 32 =
24. 24.55 × 24 =
25. 25.65 × 8 =
26. 26.14 × 35 =
27. 27.10 × 75 =
28. 28.12 × 15 =
29. 29.35 × 16 =
30. 30.8 × 65 =
31. 31.8 × 65 =
32. 32.26 × 25 =
33. 33.45 × 16 =
34. 34.34 × 125 =
35. 35.125 × 20 =
36. 36.12 × 35 =
37. 37.35 × 16 =
38. 38.12 × 55 =
39. 39.10 × 35 =
40. 40.6 × 45 =

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