Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 576 · 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. 1.125 × 36 =
2. 2.30 × 25 =
3. 3.15 × 26 =
4. 4.75 × 24 =
5. 5.15 × 40 =
6. 6.35 × 18 =
7. 7.15 × 10 =
8. 8.22 × 45 =
9. 9.25 × 34 =
10. 10.15 × 34 =
11. 11.55 × 34 =
12. 12.20 × 25 =
13. 13.75 × 6 =
14. 14.16 × 75 =
15. 15.8 × 25 =
16. 16.22 × 125 =
17. 17.18 × 45 =
18. 18.25 × 16 =
19. 19.35 × 28 =
20. 20.75 × 10 =
21. 21.26 × 25 =
22. 22.36 × 125 =
23. 23.35 × 40 =
24. 24.24 × 55 =
25. 25.15 × 26 =
26. 26.20 × 75 =
27. 27.25 × 36 =
28. 28.15 × 36 =
29. 29.34 × 25 =
30. 30.16 × 125 =
31. 31.35 × 28 =
32. 32.12 × 55 =
33. 33.45 × 14 =
34. 34.15 × 10 =
35. 35.16 × 125 =
36. 36.75 × 22 =
37. 37.15 × 10 =
38. 38.35 × 24 =
39. 39.25 × 30 =
40. 40.6 × 65 =

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