Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 468 · 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 × 30 =
2. 2.125 × 10 =
3. 3.10 × 25 =
4. 4.75 × 20 =
5. 5.28 × 55 =
6. 6.38 × 15 =
7. 7.25 × 30 =
8. 8.75 × 8 =
9. 9.125 × 30 =
10. 10.22 × 75 =
11. 11.36 × 25 =
12. 12.125 × 30 =
13. 13.20 × 55 =
14. 14.45 × 18 =
15. 15.25 × 30 =
16. 16.65 × 24 =
17. 17.55 × 18 =
18. 18.24 × 65 =
19. 19.55 × 40 =
20. 20.45 × 16 =
21. 21.40 × 55 =
22. 22.65 × 18 =
23. 23.35 × 26 =
24. 24.35 × 22 =
25. 25.30 × 15 =
26. 26.55 × 12 =
27. 27.15 × 28 =
28. 28.25 × 22 =
29. 29.26 × 125 =
30. 30.35 × 32 =
31. 31.35 × 22 =
32. 32.26 × 25 =
33. 33.28 × 25 =
34. 34.125 × 38 =
35. 35.55 × 38 =
36. 36.75 × 24 =
37. 37.20 × 75 =
38. 38.32 × 45 =
39. 39.75 × 10 =
40. 40.8 × 55 =

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