Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 842 · 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. 1.25 × 8 =
2. 2.24 × 65 =
3. 3.45 × 32 =
4. 4.20 × 35 =
5. 5.65 × 10 =
6. 6.55 × 16 =
7. 7.34 × 35 =
8. 8.22 × 25 =
9. 9.34 × 35 =
10. 10.15 × 34 =
11. 11.55 × 20 =
12. 12.14 × 25 =
13. 13.20 × 125 =
14. 14.25 × 8 =
15. 15.24 × 65 =
16. 16.75 × 16 =
17. 17.25 × 18 =
18. 18.15 × 24 =
19. 19.75 × 40 =
20. 20.25 × 40 =
21. 21.75 × 26 =
22. 22.6 × 55 =
23. 23.45 × 14 =
24. 24.65 × 36 =
25. 25.10 × 25 =
26. 26.16 × 25 =
27. 27.36 × 75 =
28. 28.14 × 35 =
29. 29.55 × 32 =
30. 30.45 × 40 =
31. 31.16 × 45 =
32. 32.25 × 28 =
33. 33.75 × 14 =
34. 34.55 × 38 =
35. 35.34 × 35 =
36. 36.10 × 75 =
37. 37.32 × 125 =
38. 38.55 × 38 =
39. 39.45 × 8 =
40. 40.45 × 24 =

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