Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 184 · 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. 1.75 × 20 =
2. 2.125 × 8 =
3. 3.32 × 45 =
4. 4.6 × 15 =
5. 5.34 × 25 =
6. 6.38 × 35 =
7. 7.125 × 16 =
8. 8.38 × 15 =
9. 9.34 × 55 =
10. 10.14 × 75 =
11. 11.25 × 30 =
12. 12.22 × 65 =
13. 13.55 × 32 =
14. 14.12 × 125 =
15. 15.65 × 22 =
16. 16.75 × 22 =
17. 17.22 × 75 =
18. 18.45 × 6 =
19. 19.35 × 40 =
20. 20.35 × 36 =
21. 21.8 × 25 =
22. 22.28 × 55 =
23. 23.24 × 55 =
24. 24.28 × 35 =
25. 25.45 × 34 =
26. 26.38 × 65 =
27. 27.15 × 36 =
28. 28.75 × 8 =
29. 29.35 × 34 =
30. 30.8 × 125 =
31. 31.125 × 38 =
32. 32.38 × 125 =
33. 33.32 × 15 =
34. 34.45 × 10 =
35. 35.65 × 34 =
36. 36.55 × 20 =
37. 37.25 × 22 =
38. 38.8 × 35 =
39. 39.35 × 12 =
40. 40.28 × 45 =

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