Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 755 · 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. 1.6 × 25 =
2. 2.8 × 35 =
3. 3.25 × 26 =
4. 4.25 × 18 =
5. 5.28 × 75 =
6. 6.24 × 65 =
7. 7.25 × 14 =
8. 8.40 × 15 =
9. 9.40 × 65 =
10. 10.35 × 40 =
11. 11.75 × 32 =
12. 12.30 × 45 =
13. 13.65 × 18 =
14. 14.25 × 8 =
15. 15.40 × 35 =
16. 16.15 × 34 =
17. 17.25 × 22 =
18. 18.65 × 26 =
19. 19.75 × 26 =
20. 20.12 × 55 =
21. 21.14 × 45 =
22. 22.22 × 25 =
23. 23.8 × 55 =
24. 24.125 × 10 =
25. 25.12 × 125 =
26. 26.75 × 20 =
27. 27.55 × 30 =
28. 28.18 × 25 =
29. 29.35 × 10 =
30. 30.8 × 15 =
31. 31.25 × 40 =
32. 32.34 × 125 =
33. 33.14 × 55 =
34. 34.18 × 45 =
35. 35.25 × 18 =
36. 36.65 × 26 =
37. 37.28 × 15 =
38. 38.45 × 10 =
39. 39.15 × 38 =
40. 40.15 × 6 =

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