Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 518 · 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. 1.25 × 16 =
2. 2.36 × 35 =
3. 3.45 × 16 =
4. 4.75 × 26 =
5. 5.30 × 15 =
6. 6.75 × 16 =
7. 7.34 × 35 =
8. 8.35 × 18 =
9. 9.8 × 55 =
10. 10.55 × 18 =
11. 11.45 × 6 =
12. 12.55 × 26 =
13. 13.65 × 22 =
14. 14.35 × 6 =
15. 15.65 × 22 =
16. 16.6 × 75 =
17. 17.26 × 35 =
18. 18.125 × 36 =
19. 19.45 × 12 =
20. 20.25 × 22 =
21. 21.65 × 8 =
22. 22.45 × 8 =
23. 23.75 × 30 =
24. 24.30 × 35 =
25. 25.10 × 55 =
26. 26.20 × 35 =
27. 27.40 × 35 =
28. 28.36 × 55 =
29. 29.36 × 55 =
30. 30.75 × 34 =
31. 31.12 × 45 =
32. 32.25 × 22 =
33. 33.75 × 28 =
34. 34.26 × 55 =
35. 35.25 × 14 =
36. 36.25 × 12 =
37. 37.28 × 15 =
38. 38.32 × 55 =
39. 39.25 × 14 =
40. 40.8 × 125 =

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