Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 873 · 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. 1.34 × 45 =
2. 2.32 × 15 =
3. 3.14 × 125 =
4. 4.45 × 22 =
5. 5.38 × 45 =
6. 6.45 × 20 =
7. 7.25 × 12 =
8. 8.75 × 18 =
9. 9.35 × 20 =
10. 10.75 × 12 =
11. 11.26 × 35 =
12. 12.55 × 12 =
13. 13.16 × 75 =
14. 14.14 × 15 =
15. 15.15 × 14 =
16. 16.22 × 55 =
17. 17.22 × 35 =
18. 18.45 × 18 =
19. 19.10 × 65 =
20. 20.36 × 125 =
21. 21.24 × 125 =
22. 22.10 × 45 =
23. 23.34 × 75 =
24. 24.8 × 75 =
25. 25.15 × 26 =
26. 26.16 × 45 =
27. 27.25 × 12 =
28. 28.6 × 125 =
29. 29.30 × 35 =
30. 30.75 × 34 =
31. 31.65 × 38 =
32. 32.20 × 15 =
33. 33.45 × 20 =
34. 34.16 × 75 =
35. 35.34 × 15 =
36. 36.55 × 40 =
37. 37.15 × 18 =
38. 38.10 × 45 =
39. 39.14 × 55 =
40. 40.55 × 14 =

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