Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 233 · 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. 1.15 × 8 =
2. 2.55 × 12 =
3. 3.14 × 35 =
4. 4.18 × 125 =
5. 5.30 × 25 =
6. 6.35 × 10 =
7. 7.12 × 65 =
8. 8.75 × 38 =
9. 9.16 × 65 =
10. 10.65 × 40 =
11. 11.10 × 45 =
12. 12.18 × 65 =
13. 13.40 × 55 =
14. 14.16 × 55 =
15. 15.26 × 75 =
16. 16.125 × 18 =
17. 17.8 × 55 =
18. 18.35 × 18 =
19. 19.15 × 38 =
20. 20.36 × 25 =
21. 21.55 × 38 =
22. 22.55 × 26 =
23. 23.32 × 75 =
24. 24.30 × 25 =
25. 25.65 × 12 =
26. 26.15 × 34 =
27. 27.65 × 16 =
28. 28.32 × 25 =
29. 29.30 × 125 =
30. 30.26 × 35 =
31. 31.25 × 40 =
32. 32.75 × 6 =
33. 33.30 × 25 =
34. 34.45 × 38 =
35. 35.65 × 22 =
36. 36.45 × 16 =
37. 37.12 × 75 =
38. 38.10 × 15 =
39. 39.18 × 15 =
40. 40.22 × 125 =

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