Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 918 · 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. 1.14 × 25 =
2. 2.12 × 35 =
3. 3.55 × 6 =
4. 4.26 × 65 =
5. 5.25 × 40 =
6. 6.45 × 36 =
7. 7.25 × 28 =
8. 8.125 × 20 =
9. 9.35 × 8 =
10. 10.35 × 6 =
11. 11.75 × 14 =
12. 12.35 × 38 =
13. 13.55 × 10 =
14. 14.65 × 28 =
15. 15.20 × 75 =
16. 16.35 × 10 =
17. 17.35 × 40 =
18. 18.125 × 12 =
19. 19.30 × 45 =
20. 20.125 × 24 =
21. 21.32 × 45 =
22. 22.15 × 34 =
23. 23.30 × 25 =
24. 24.65 × 34 =
25. 25.28 × 35 =
26. 26.15 × 24 =
27. 27.75 × 30 =
28. 28.55 × 26 =
29. 29.35 × 40 =
30. 30.35 × 8 =
31. 31.35 × 12 =
32. 32.24 × 75 =
33. 33.15 × 20 =
34. 34.38 × 75 =
35. 35.16 × 65 =
36. 36.10 × 55 =
37. 37.25 × 20 =
38. 38.8 × 55 =
39. 39.22 × 35 =
40. 40.32 × 125 =

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