Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 476 · 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. 2.55 × 36 =
3. 3.30 × 125 =
4. 4.38 × 55 =
5. 5.12 × 55 =
6. 6.55 × 30 =
7. 7.18 × 15 =
8. 8.15 × 30 =
9. 9.65 × 14 =
10. 10.55 × 8 =
11. 11.65 × 14 =
12. 12.55 × 14 =
13. 13.15 × 32 =
14. 14.8 × 25 =
15. 15.40 × 35 =
16. 16.15 × 14 =
17. 17.15 × 38 =
18. 18.125 × 36 =
19. 19.30 × 15 =
20. 20.38 × 55 =
21. 21.30 × 75 =
22. 22.26 × 15 =
23. 23.65 × 12 =
24. 24.15 × 10 =
25. 25.20 × 75 =
26. 26.12 × 45 =
27. 27.75 × 20 =
28. 28.28 × 45 =
29. 29.25 × 32 =
30. 30.25 × 26 =
31. 31.24 × 75 =
32. 32.55 × 14 =
33. 33.30 × 35 =
34. 34.30 × 45 =
35. 35.20 × 55 =
36. 36.45 × 36 =
37. 37.20 × 65 =
38. 38.65 × 40 =
39. 39.75 × 30 =
40. 40.15 × 14 =

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