Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 602 · 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. 1.125 × 10 =
2. 2.15 × 10 =
3. 3.32 × 125 =
4. 4.25 × 12 =
5. 5.28 × 15 =
6. 6.15 × 32 =
7. 7.125 × 32 =
8. 8.28 × 75 =
9. 9.6 × 35 =
10. 10.28 × 45 =
11. 11.25 × 18 =
12. 12.6 × 65 =
13. 13.65 × 20 =
14. 14.15 × 36 =
15. 15.125 × 12 =
16. 16.35 × 12 =
17. 17.45 × 34 =
18. 18.24 × 15 =
19. 19.10 × 125 =
20. 20.75 × 20 =
21. 21.18 × 45 =
22. 22.20 × 75 =
23. 23.15 × 16 =
24. 24.24 × 45 =
25. 25.26 × 65 =
26. 26.25 × 32 =
27. 27.25 × 10 =
28. 28.14 × 55 =
29. 29.15 × 38 =
30. 30.35 × 40 =
31. 31.16 × 45 =
32. 32.34 × 15 =
33. 33.26 × 125 =
34. 34.18 × 55 =
35. 35.10 × 125 =
36. 36.125 × 10 =
37. 37.75 × 26 =
38. 38.34 × 65 =
39. 39.38 × 35 =
40. 40.14 × 45 =

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