Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 499 · 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. 2.20 × 25 =
3. 3.15 × 26 =
4. 4.25 × 6 =
5. 5.65 × 14 =
6. 6.65 × 34 =
7. 7.35 × 12 =
8. 8.28 × 65 =
9. 9.10 × 75 =
10. 10.55 × 12 =
11. 11.65 × 24 =
12. 12.35 × 32 =
13. 13.26 × 35 =
14. 14.6 × 125 =
15. 15.40 × 75 =
16. 16.18 × 65 =
17. 17.15 × 8 =
18. 18.10 × 35 =
19. 19.24 × 65 =
20. 20.18 × 25 =
21. 21.28 × 35 =
22. 22.36 × 75 =
23. 23.35 × 22 =
24. 24.35 × 22 =
25. 25.40 × 75 =
26. 26.125 × 8 =
27. 27.10 × 75 =
28. 28.40 × 55 =
29. 29.16 × 15 =
30. 30.75 × 14 =
31. 31.30 × 65 =
32. 32.55 × 36 =
33. 33.38 × 65 =
34. 34.55 × 38 =
35. 35.25 × 12 =
36. 36.34 × 15 =
37. 37.125 × 6 =
38. 38.18 × 55 =
39. 39.75 × 16 =
40. 40.15 × 18 =

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