Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 876 · 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 × 15 =
2. 2.75 × 16 =
3. 3.32 × 15 =
4. 4.10 × 75 =
5. 5.18 × 55 =
6. 6.125 × 38 =
7. 7.55 × 24 =
8. 8.15 × 16 =
9. 9.25 × 6 =
10. 10.65 × 10 =
11. 11.10 × 35 =
12. 12.15 × 26 =
13. 13.6 × 45 =
14. 14.35 × 8 =
15. 15.45 × 22 =
16. 16.15 × 12 =
17. 17.8 × 35 =
18. 18.15 × 32 =
19. 19.35 × 8 =
20. 20.125 × 20 =
21. 21.40 × 35 =
22. 22.14 × 25 =
23. 23.24 × 75 =
24. 24.28 × 25 =
25. 25.30 × 75 =
26. 26.15 × 6 =
27. 27.26 × 55 =
28. 28.16 × 35 =
29. 29.14 × 35 =
30. 30.6 × 15 =
31. 31.55 × 22 =
32. 32.6 × 45 =
33. 33.18 × 25 =
34. 34.18 × 65 =
35. 35.125 × 18 =
36. 36.24 × 65 =
37. 37.32 × 125 =
38. 38.20 × 75 =
39. 39.10 × 45 =
40. 40.45 × 22 =

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