Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 208 · 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. 1.18 × 55 =
2. 2.75 × 10 =
3. 3.35 × 38 =
4. 4.25 × 24 =
5. 5.20 × 65 =
6. 6.14 × 45 =
7. 7.10 × 35 =
8. 8.18 × 75 =
9. 9.36 × 15 =
10. 10.45 × 12 =
11. 11.20 × 15 =
12. 12.45 × 32 =
13. 13.25 × 18 =
14. 14.65 × 30 =
15. 15.125 × 8 =
16. 16.25 × 6 =
17. 17.25 × 30 =
18. 18.10 × 55 =
19. 19.36 × 45 =
20. 20.12 × 25 =
21. 21.28 × 45 =
22. 22.35 × 8 =
23. 23.38 × 75 =
24. 24.25 × 18 =
25. 25.125 × 14 =
26. 26.55 × 26 =
27. 27.26 × 25 =
28. 28.18 × 15 =
29. 29.40 × 35 =
30. 30.25 × 38 =
31. 31.45 × 10 =
32. 32.65 × 18 =
33. 33.15 × 10 =
34. 34.35 × 32 =
35. 35.30 × 25 =
36. 36.125 × 12 =
37. 37.125 × 32 =
38. 38.6 × 125 =
39. 39.15 × 22 =
40. 40.45 × 6 =

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