Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 885 · 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. 1.6 × 75 =
2. 2.65 × 34 =
3. 3.8 × 25 =
4. 4.34 × 65 =
5. 5.20 × 25 =
6. 6.75 × 6 =
7. 7.25 × 14 =
8. 8.14 × 25 =
9. 9.125 × 6 =
10. 10.38 × 25 =
11. 11.45 × 18 =
12. 12.38 × 15 =
13. 13.34 × 55 =
14. 14.125 × 36 =
15. 15.45 × 6 =
16. 16.8 × 35 =
17. 17.75 × 14 =
18. 18.75 × 18 =
19. 19.18 × 25 =
20. 20.15 × 18 =
21. 21.75 × 8 =
22. 22.25 × 16 =
23. 23.38 × 75 =
24. 24.6 × 55 =
25. 25.14 × 15 =
26. 26.125 × 6 =
27. 27.40 × 55 =
28. 28.18 × 55 =
29. 29.30 × 15 =
30. 30.14 × 65 =
31. 31.15 × 26 =
32. 32.75 × 8 =
33. 33.55 × 18 =
34. 34.38 × 75 =
35. 35.22 × 65 =
36. 36.15 × 30 =
37. 37.75 × 14 =
38. 38.55 × 14 =
39. 39.35 × 12 =
40. 40.125 × 20 =

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