Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 263 · 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 × 40 =
2. 2.65 × 22 =
3. 3.65 × 6 =
4. 4.125 × 16 =
5. 5.25 × 6 =
6. 6.25 × 22 =
7. 7.8 × 45 =
8. 8.34 × 45 =
9. 9.15 × 24 =
10. 10.55 × 10 =
11. 11.35 × 14 =
12. 12.25 × 8 =
13. 13.55 × 26 =
14. 14.40 × 65 =
15. 15.15 × 28 =
16. 16.28 × 45 =
17. 17.25 × 22 =
18. 18.25 × 16 =
19. 19.14 × 55 =
20. 20.36 × 45 =
21. 21.25 × 30 =
22. 22.14 × 45 =
23. 23.55 × 34 =
24. 24.65 × 38 =
25. 25.6 × 125 =
26. 26.24 × 35 =
27. 27.125 × 12 =
28. 28.125 × 20 =
29. 29.25 × 14 =
30. 30.22 × 15 =
31. 31.75 × 18 =
32. 32.14 × 25 =
33. 33.20 × 25 =
34. 34.32 × 35 =
35. 35.25 × 32 =
36. 36.55 × 16 =
37. 37.18 × 15 =
38. 38.8 × 25 =
39. 39.40 × 45 =
40. 40.30 × 55 =

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