Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 311 · 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. 1.55 × 14 =
2. 2.40 × 35 =
3. 3.25 × 36 =
4. 4.65 × 30 =
5. 5.65 × 16 =
6. 6.15 × 14 =
7. 7.35 × 12 =
8. 8.35 × 6 =
9. 9.8 × 45 =
10. 10.36 × 25 =
11. 11.25 × 12 =
12. 12.35 × 18 =
13. 13.125 × 24 =
14. 14.55 × 16 =
15. 15.25 × 18 =
16. 16.15 × 32 =
17. 17.10 × 75 =
18. 18.35 × 6 =
19. 19.45 × 26 =
20. 20.6 × 45 =
21. 21.22 × 125 =
22. 22.14 × 75 =
23. 23.65 × 34 =
24. 24.75 × 30 =
25. 25.45 × 38 =
26. 26.55 × 18 =
27. 27.10 × 55 =
28. 28.75 × 12 =
29. 29.75 × 24 =
30. 30.34 × 35 =
31. 31.35 × 40 =
32. 32.14 × 75 =
33. 33.75 × 38 =
34. 34.65 × 34 =
35. 35.45 × 38 =
36. 36.6 × 45 =
37. 37.28 × 45 =
38. 38.45 × 6 =
39. 39.15 × 26 =
40. 40.65 × 14 =

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