Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 326 · 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. 1.8 × 65 =
2. 2.30 × 35 =
3. 3.32 × 55 =
4. 4.45 × 12 =
5. 5.34 × 75 =
6. 6.14 × 35 =
7. 7.25 × 26 =
8. 8.35 × 20 =
9. 9.125 × 14 =
10. 10.30 × 15 =
11. 11.14 × 65 =
12. 12.15 × 12 =
13. 13.22 × 35 =
14. 14.25 × 20 =
15. 15.15 × 22 =
16. 16.36 × 45 =
17. 17.25 × 14 =
18. 18.14 × 15 =
19. 19.15 × 6 =
20. 20.65 × 32 =
21. 21.38 × 15 =
22. 22.55 × 28 =
23. 23.75 × 22 =
24. 24.25 × 22 =
25. 25.15 × 32 =
26. 26.15 × 22 =
27. 27.10 × 75 =
28. 28.24 × 55 =
29. 29.25 × 38 =
30. 30.45 × 38 =
31. 31.15 × 10 =
32. 32.8 × 125 =
33. 33.15 × 26 =
34. 34.15 × 14 =
35. 35.45 × 20 =
36. 36.40 × 35 =
37. 37.6 × 15 =
38. 38.38 × 15 =
39. 39.45 × 6 =
40. 40.25 × 8 =

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