Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 458 · 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 × 26 =
2. 2.45 × 14 =
3. 3.45 × 6 =
4. 4.25 × 20 =
5. 5.34 × 25 =
6. 6.16 × 15 =
7. 7.24 × 15 =
8. 8.45 × 6 =
9. 9.15 × 6 =
10. 10.20 × 45 =
11. 11.75 × 14 =
12. 12.55 × 8 =
13. 13.20 × 75 =
14. 14.22 × 45 =
15. 15.8 × 65 =
16. 16.125 × 22 =
17. 17.15 × 12 =
18. 18.15 × 30 =
19. 19.55 × 26 =
20. 20.38 × 45 =
21. 21.15 × 18 =
22. 22.15 × 10 =
23. 23.40 × 75 =
24. 24.22 × 35 =
25. 25.30 × 125 =
26. 26.40 × 25 =
27. 27.55 × 20 =
28. 28.40 × 65 =
29. 29.65 × 20 =
30. 30.34 × 35 =
31. 31.38 × 35 =
32. 32.14 × 15 =
33. 33.32 × 65 =
34. 34.35 × 6 =
35. 35.26 × 45 =
36. 36.55 × 12 =
37. 37.18 × 45 =
38. 38.18 × 65 =
39. 39.14 × 55 =
40. 40.45 × 36 =

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