Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 101 · 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. 1.25 × 24 =
2. 2.35 × 30 =
3. 3.30 × 55 =
4. 4.8 × 15 =
5. 5.75 × 10 =
6. 6.45 × 8 =
7. 7.55 × 14 =
8. 8.28 × 15 =
9. 9.22 × 55 =
10. 10.18 × 75 =
11. 11.6 × 55 =
12. 12.26 × 55 =
13. 13.65 × 40 =
14. 14.14 × 15 =
15. 15.12 × 15 =
16. 16.55 × 36 =
17. 17.15 × 34 =
18. 18.55 × 16 =
19. 19.15 × 6 =
20. 20.65 × 22 =
21. 21.12 × 65 =
22. 22.34 × 35 =
23. 23.45 × 14 =
24. 24.34 × 125 =
25. 25.15 × 12 =
26. 26.15 × 22 =
27. 27.75 × 26 =
28. 28.20 × 75 =
29. 29.18 × 65 =
30. 30.25 × 28 =
31. 31.125 × 10 =
32. 32.8 × 15 =
33. 33.45 × 16 =
34. 34.25 × 22 =
35. 35.26 × 45 =
36. 36.55 × 18 =
37. 37.35 × 12 =
38. 38.32 × 45 =
39. 39.125 × 18 =
40. 40.35 × 18 =

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