Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 30 · 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. 1.38 × 55 =
2. 2.18 × 15 =
3. 3.75 × 16 =
4. 4.65 × 16 =
5. 5.75 × 12 =
6. 6.45 × 14 =
7. 7.30 × 25 =
8. 8.45 × 12 =
9. 9.25 × 8 =
10. 10.24 × 25 =
11. 11.125 × 34 =
12. 12.34 × 65 =
13. 13.125 × 20 =
14. 14.45 × 38 =
15. 15.22 × 45 =
16. 16.30 × 15 =
17. 17.26 × 55 =
18. 18.32 × 55 =
19. 19.10 × 15 =
20. 20.35 × 36 =
21. 21.30 × 65 =
22. 22.25 × 24 =
23. 23.45 × 32 =
24. 24.55 × 22 =
25. 25.45 × 40 =
26. 26.125 × 34 =
27. 27.8 × 15 =
28. 28.28 × 65 =
29. 29.6 × 25 =
30. 30.55 × 38 =
31. 31.65 × 38 =
32. 32.45 × 34 =
33. 33.75 × 32 =
34. 34.14 × 75 =
35. 35.125 × 24 =
36. 36.65 × 32 =
37. 37.30 × 125 =
38. 38.15 × 20 =
39. 39.55 × 8 =
40. 40.15 × 12 =

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