Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 916 · 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. 1.75 × 14 =
2. 2.65 × 36 =
3. 3.55 × 16 =
4. 4.55 × 32 =
5. 5.35 × 36 =
6. 6.45 × 32 =
7. 7.30 × 35 =
8. 8.35 × 22 =
9. 9.10 × 15 =
10. 10.14 × 45 =
11. 11.35 × 24 =
12. 12.125 × 22 =
13. 13.65 × 24 =
14. 14.25 × 24 =
15. 15.65 × 10 =
16. 16.18 × 65 =
17. 17.25 × 38 =
18. 18.65 × 8 =
19. 19.45 × 40 =
20. 20.16 × 65 =
21. 21.24 × 25 =
22. 22.65 × 14 =
23. 23.20 × 75 =
24. 24.6 × 75 =
25. 25.30 × 35 =
26. 26.40 × 45 =
27. 27.16 × 45 =
28. 28.25 × 8 =
29. 29.45 × 16 =
30. 30.25 × 40 =
31. 31.45 × 30 =
32. 32.125 × 26 =
33. 33.34 × 55 =
34. 34.25 × 14 =
35. 35.35 × 16 =
36. 36.30 × 65 =
37. 37.125 × 14 =
38. 38.75 × 30 =
39. 39.6 × 25 =
40. 40.8 × 125 =

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