Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 148 · 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. 1.16 × 25 =
2. 2.65 × 8 =
3. 3.35 × 18 =
4. 4.45 × 28 =
5. 5.14 × 55 =
6. 6.36 × 75 =
7. 7.40 × 15 =
8. 8.15 × 12 =
9. 9.36 × 35 =
10. 10.34 × 25 =
11. 11.35 × 8 =
12. 12.32 × 15 =
13. 13.14 × 55 =
14. 14.75 × 30 =
15. 15.15 × 36 =
16. 16.45 × 16 =
17. 17.25 × 12 =
18. 18.25 × 20 =
19. 19.25 × 6 =
20. 20.35 × 40 =
21. 21.15 × 18 =
22. 22.20 × 25 =
23. 23.25 × 16 =
24. 24.25 × 18 =
25. 25.55 × 38 =
26. 26.75 × 14 =
27. 27.24 × 35 =
28. 28.125 × 22 =
29. 29.28 × 55 =
30. 30.10 × 55 =
31. 31.15 × 8 =
32. 32.25 × 16 =
33. 33.32 × 25 =
34. 34.18 × 15 =
35. 35.75 × 12 =
36. 36.35 × 22 =
37. 37.125 × 6 =
38. 38.25 × 14 =
39. 39.25 × 24 =
40. 40.55 × 32 =

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