Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 898 · 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. 1.34 × 75 =
2. 2.35 × 30 =
3. 3.55 × 32 =
4. 4.15 × 12 =
5. 5.35 × 40 =
6. 6.28 × 35 =
7. 7.22 × 125 =
8. 8.75 × 28 =
9. 9.10 × 35 =
10. 10.6 × 75 =
11. 11.125 × 20 =
12. 12.65 × 18 =
13. 13.15 × 14 =
14. 14.15 × 14 =
15. 15.75 × 36 =
16. 16.15 × 6 =
17. 17.55 × 14 =
18. 18.28 × 35 =
19. 19.45 × 10 =
20. 20.125 × 22 =
21. 21.15 × 38 =
22. 22.75 × 16 =
23. 23.8 × 75 =
24. 24.10 × 35 =
25. 25.45 × 36 =
26. 26.35 × 26 =
27. 27.55 × 12 =
28. 28.26 × 75 =
29. 29.16 × 25 =
30. 30.45 × 22 =
31. 31.12 × 55 =
32. 32.20 × 15 =
33. 33.20 × 25 =
34. 34.125 × 26 =
35. 35.34 × 45 =
36. 36.35 × 28 =
37. 37.12 × 45 =
38. 38.14 × 75 =
39. 39.25 × 36 =
40. 40.25 × 20 =

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