Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 541 · 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. 1.16 × 25 =
2. 2.75 × 12 =
3. 3.35 × 8 =
4. 4.75 × 10 =
5. 5.75 × 36 =
6. 6.18 × 125 =
7. 7.14 × 125 =
8. 8.25 × 24 =
9. 9.45 × 34 =
10. 10.25 × 36 =
11. 11.34 × 55 =
12. 12.55 × 32 =
13. 13.30 × 15 =
14. 14.18 × 45 =
15. 15.75 × 34 =
16. 16.125 × 30 =
17. 17.15 × 24 =
18. 18.32 × 75 =
19. 19.45 × 16 =
20. 20.30 × 65 =
21. 21.45 × 26 =
22. 22.25 × 24 =
23. 23.25 × 14 =
24. 24.26 × 125 =
25. 25.35 × 12 =
26. 26.6 × 125 =
27. 27.75 × 32 =
28. 28.75 × 12 =
29. 29.40 × 25 =
30. 30.65 × 14 =
31. 31.6 × 55 =
32. 32.65 × 12 =
33. 33.35 × 26 =
34. 34.14 × 45 =
35. 35.125 × 24 =
36. 36.16 × 35 =
37. 37.35 × 6 =
38. 38.25 × 28 =
39. 39.32 × 75 =
40. 40.22 × 125 =

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