Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 154 · 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. 2.16 × 45 =
3. 3.55 × 30 =
4. 4.22 × 25 =
5. 5.25 × 30 =
6. 6.8 × 25 =
7. 7.65 × 36 =
8. 8.8 × 15 =
9. 9.18 × 125 =
10. 10.8 × 125 =
11. 11.26 × 45 =
12. 12.12 × 125 =
13. 13.38 × 15 =
14. 14.65 × 8 =
15. 15.32 × 45 =
16. 16.25 × 16 =
17. 17.55 × 22 =
18. 18.18 × 125 =
19. 19.6 × 125 =
20. 20.30 × 35 =
21. 21.75 × 10 =
22. 22.15 × 30 =
23. 23.16 × 35 =
24. 24.18 × 45 =
25. 25.125 × 38 =
26. 26.15 × 16 =
27. 27.65 × 18 =
28. 28.18 × 125 =
29. 29.125 × 6 =
30. 30.15 × 6 =
31. 31.35 × 38 =
32. 32.45 × 28 =
33. 33.30 × 25 =
34. 34.26 × 125 =
35. 35.45 × 22 =
36. 36.38 × 45 =
37. 37.34 × 65 =
38. 38.6 × 35 =
39. 39.14 × 25 =
40. 40.15 × 14 =

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