Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 173 · 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. 1.65 × 14 =
2. 2.15 × 24 =
3. 3.40 × 25 =
4. 4.36 × 15 =
5. 5.26 × 15 =
6. 6.35 × 36 =
7. 7.125 × 34 =
8. 8.125 × 12 =
9. 9.125 × 32 =
10. 10.12 × 35 =
11. 11.6 × 125 =
12. 12.32 × 75 =
13. 13.65 × 12 =
14. 14.55 × 22 =
15. 15.15 × 40 =
16. 16.15 × 32 =
17. 17.26 × 125 =
18. 18.25 × 20 =
19. 19.38 × 65 =
20. 20.35 × 18 =
21. 21.18 × 35 =
22. 22.38 × 125 =
23. 23.35 × 22 =
24. 24.25 × 8 =
25. 25.25 × 24 =
26. 26.15 × 26 =
27. 27.16 × 15 =
28. 28.55 × 6 =
29. 29.14 × 55 =
30. 30.55 × 20 =
31. 31.15 × 8 =
32. 32.18 × 25 =
33. 33.35 × 10 =
34. 34.30 × 35 =
35. 35.28 × 25 =
36. 36.55 × 18 =
37. 37.45 × 8 =
38. 38.24 × 75 =
39. 39.24 × 65 =
40. 40.16 × 75 =

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