Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 146 · 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 × 75 =
2. 2.45 × 38 =
3. 3.16 × 125 =
4. 4.125 × 36 =
5. 5.55 × 36 =
6. 6.65 × 24 =
7. 7.15 × 28 =
8. 8.34 × 75 =
9. 9.28 × 35 =
10. 10.15 × 8 =
11. 11.15 × 12 =
12. 12.35 × 36 =
13. 13.25 × 28 =
14. 14.20 × 75 =
15. 15.65 × 10 =
16. 16.34 × 45 =
17. 17.25 × 34 =
18. 18.34 × 75 =
19. 19.65 × 32 =
20. 20.25 × 30 =
21. 21.12 × 125 =
22. 22.55 × 12 =
23. 23.6 × 35 =
24. 24.8 × 45 =
25. 25.32 × 45 =
26. 26.26 × 45 =
27. 27.28 × 35 =
28. 28.15 × 18 =
29. 29.125 × 30 =
30. 30.125 × 26 =
31. 31.20 × 75 =
32. 32.30 × 25 =
33. 33.15 × 6 =
34. 34.65 × 30 =
35. 35.32 × 55 =
36. 36.25 × 26 =
37. 37.18 × 25 =
38. 38.35 × 28 =
39. 39.34 × 125 =
40. 40.75 × 8 =

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