Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 243 · 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. 2.35 × 30 =
3. 3.55 × 38 =
4. 4.8 × 25 =
5. 5.32 × 25 =
6. 6.32 × 55 =
7. 7.65 × 18 =
8. 8.14 × 125 =
9. 9.125 × 18 =
10. 10.65 × 20 =
11. 11.45 × 12 =
12. 12.55 × 24 =
13. 13.65 × 24 =
14. 14.10 × 25 =
15. 15.45 × 18 =
16. 16.34 × 125 =
17. 17.14 × 35 =
18. 18.75 × 26 =
19. 19.32 × 75 =
20. 20.35 × 36 =
21. 21.26 × 15 =
22. 22.45 × 12 =
23. 23.55 × 18 =
24. 24.35 × 30 =
25. 25.6 × 65 =
26. 26.26 × 75 =
27. 27.15 × 16 =
28. 28.6 × 125 =
29. 29.55 × 24 =
30. 30.8 × 65 =
31. 31.25 × 14 =
32. 32.25 × 36 =
33. 33.25 × 8 =
34. 34.36 × 45 =
35. 35.38 × 25 =
36. 36.75 × 28 =
37. 37.28 × 65 =
38. 38.55 × 32 =
39. 39.6 × 65 =
40. 40.20 × 15 =

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