Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 703 · 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 × 10 =
2. 2.26 × 25 =
3. 3.38 × 125 =
4. 4.15 × 6 =
5. 5.55 × 18 =
6. 6.32 × 65 =
7. 7.45 × 34 =
8. 8.14 × 75 =
9. 9.65 × 28 =
10. 10.10 × 125 =
11. 11.8 × 75 =
12. 12.15 × 28 =
13. 13.55 × 16 =
14. 14.45 × 12 =
15. 15.45 × 24 =
16. 16.65 × 10 =
17. 17.12 × 15 =
18. 18.125 × 26 =
19. 19.25 × 18 =
20. 20.40 × 25 =
21. 21.25 × 24 =
22. 22.15 × 20 =
23. 23.35 × 22 =
24. 24.34 × 55 =
25. 25.28 × 25 =
26. 26.75 × 6 =
27. 27.125 × 8 =
28. 28.55 × 22 =
29. 29.38 × 15 =
30. 30.75 × 12 =
31. 31.6 × 45 =
32. 32.32 × 15 =
33. 33.22 × 55 =
34. 34.34 × 15 =
35. 35.36 × 45 =
36. 36.14 × 125 =
37. 37.125 × 12 =
38. 38.35 × 34 =
39. 39.75 × 38 =
40. 40.32 × 55 =

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