Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 156 · 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. 1.55 × 38 =
2. 2.55 × 24 =
3. 3.125 × 16 =
4. 4.15 × 32 =
5. 5.14 × 125 =
6. 6.20 × 15 =
7. 7.22 × 45 =
8. 8.35 × 26 =
9. 9.18 × 55 =
10. 10.75 × 36 =
11. 11.12 × 125 =
12. 12.16 × 45 =
13. 13.14 × 15 =
14. 14.8 × 45 =
15. 15.25 × 22 =
16. 16.8 × 45 =
17. 17.32 × 65 =
18. 18.20 × 25 =
19. 19.40 × 25 =
20. 20.45 × 8 =
21. 21.75 × 6 =
22. 22.75 × 36 =
23. 23.65 × 16 =
24. 24.22 × 65 =
25. 25.34 × 25 =
26. 26.14 × 125 =
27. 27.40 × 65 =
28. 28.35 × 18 =
29. 29.20 × 15 =
30. 30.55 × 38 =
31. 31.15 × 6 =
32. 32.38 × 15 =
33. 33.35 × 36 =
34. 34.24 × 75 =
35. 35.38 × 25 =
36. 36.32 × 15 =
37. 37.35 × 24 =
38. 38.14 × 45 =
39. 39.25 × 6 =
40. 40.125 × 20 =

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