Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 216 · 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. 1.30 × 65 =
2. 2.20 × 65 =
3. 3.18 × 35 =
4. 4.55 × 38 =
5. 5.55 × 30 =
6. 6.8 × 75 =
7. 7.32 × 45 =
8. 8.25 × 20 =
9. 9.125 × 6 =
10. 10.15 × 38 =
11. 11.25 × 38 =
12. 12.40 × 125 =
13. 13.8 × 25 =
14. 14.36 × 125 =
15. 15.45 × 34 =
16. 16.65 × 12 =
17. 17.22 × 45 =
18. 18.34 × 55 =
19. 19.65 × 22 =
20. 20.36 × 25 =
21. 21.34 × 25 =
22. 22.14 × 55 =
23. 23.20 × 15 =
24. 24.35 × 12 =
25. 25.38 × 55 =
26. 26.35 × 16 =
27. 27.26 × 65 =
28. 28.15 × 28 =
29. 29.28 × 45 =
30. 30.26 × 75 =
31. 31.65 × 10 =
32. 32.30 × 75 =
33. 33.75 × 40 =
34. 34.25 × 20 =
35. 35.35 × 36 =
36. 36.24 × 65 =
37. 37.20 × 65 =
38. 38.15 × 24 =
39. 39.22 × 125 =
40. 40.10 × 15 =

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