Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 36 · 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. 1.12 × 75 =
2. 2.15 × 30 =
3. 3.15 × 10 =
4. 4.15 × 28 =
5. 5.15 × 34 =
6. 6.34 × 35 =
7. 7.55 × 38 =
8. 8.15 × 8 =
9. 9.32 × 55 =
10. 10.45 × 6 =
11. 11.55 × 22 =
12. 12.34 × 15 =
13. 13.8 × 35 =
14. 14.75 × 30 =
15. 15.10 × 35 =
16. 16.36 × 65 =
17. 17.65 × 36 =
18. 18.65 × 40 =
19. 19.35 × 36 =
20. 20.20 × 125 =
21. 21.36 × 25 =
22. 22.25 × 26 =
23. 23.18 × 65 =
24. 24.22 × 55 =
25. 25.75 × 16 =
26. 26.28 × 45 =
27. 27.25 × 34 =
28. 28.55 × 24 =
29. 29.14 × 15 =
30. 30.34 × 55 =
31. 31.10 × 75 =
32. 32.8 × 15 =
33. 33.35 × 20 =
34. 34.55 × 20 =
35. 35.65 × 40 =
36. 36.34 × 15 =
37. 37.32 × 75 =
38. 38.30 × 15 =
39. 39.45 × 10 =
40. 40.125 × 10 =

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