Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 747 · 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 × 24 =
2. 2.14 × 45 =
3. 3.35 × 22 =
4. 4.15 × 14 =
5. 5.8 × 25 =
6. 6.55 × 20 =
7. 7.16 × 35 =
8. 8.38 × 15 =
9. 9.45 × 40 =
10. 10.24 × 35 =
11. 11.25 × 12 =
12. 12.34 × 15 =
13. 13.35 × 6 =
14. 14.18 × 25 =
15. 15.18 × 125 =
16. 16.18 × 15 =
17. 17.26 × 55 =
18. 18.65 × 40 =
19. 19.25 × 38 =
20. 20.22 × 75 =
21. 21.10 × 75 =
22. 22.125 × 30 =
23. 23.36 × 125 =
24. 24.28 × 75 =
25. 25.75 × 12 =
26. 26.36 × 35 =
27. 27.22 × 55 =
28. 28.24 × 35 =
29. 29.14 × 15 =
30. 30.35 × 8 =
31. 31.75 × 18 =
32. 32.45 × 36 =
33. 33.16 × 125 =
34. 34.75 × 10 =
35. 35.28 × 65 =
36. 36.26 × 65 =
37. 37.55 × 38 =
38. 38.75 × 22 =
39. 39.35 × 12 =
40. 40.75 × 6 =

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