Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 972 · 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. 1.45 × 30 =
2. 2.15 × 12 =
3. 3.35 × 32 =
4. 4.25 × 36 =
5. 5.75 × 38 =
6. 6.75 × 14 =
7. 7.38 × 25 =
8. 8.6 × 75 =
9. 9.55 × 32 =
10. 10.34 × 25 =
11. 11.125 × 10 =
12. 12.26 × 75 =
13. 13.125 × 36 =
14. 14.14 × 25 =
15. 15.55 × 6 =
16. 16.32 × 55 =
17. 17.15 × 38 =
18. 18.12 × 45 =
19. 19.45 × 10 =
20. 20.15 × 22 =
21. 21.16 × 35 =
22. 22.10 × 55 =
23. 23.8 × 15 =
24. 24.75 × 36 =
25. 25.40 × 45 =
26. 26.26 × 65 =
27. 27.65 × 34 =
28. 28.16 × 45 =
29. 29.45 × 16 =
30. 30.18 × 25 =
31. 31.40 × 125 =
32. 32.8 × 35 =
33. 33.8 × 65 =
34. 34.15 × 20 =
35. 35.25 × 30 =
36. 36.75 × 38 =
37. 37.125 × 32 =
38. 38.55 × 6 =
39. 39.22 × 45 =
40. 40.55 × 26 =

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