Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 147 · 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. 1.12 × 55 =
2. 2.14 × 125 =
3. 3.125 × 32 =
4. 4.34 × 65 =
5. 5.75 × 22 =
6. 6.125 × 36 =
7. 7.32 × 45 =
8. 8.6 × 35 =
9. 9.65 × 8 =
10. 10.24 × 55 =
11. 11.125 × 36 =
12. 12.75 × 16 =
13. 13.45 × 36 =
14. 14.75 × 12 =
15. 15.10 × 65 =
16. 16.24 × 35 =
17. 17.8 × 15 =
18. 18.8 × 15 =
19. 19.55 × 6 =
20. 20.24 × 55 =
21. 21.12 × 35 =
22. 22.75 × 10 =
23. 23.34 × 15 =
24. 24.10 × 65 =
25. 25.75 × 38 =
26. 26.6 × 75 =
27. 27.26 × 75 =
28. 28.6 × 65 =
29. 29.6 × 75 =
30. 30.36 × 75 =
31. 31.35 × 36 =
32. 32.36 × 45 =
33. 33.38 × 65 =
34. 34.32 × 125 =
35. 35.75 × 38 =
36. 36.12 × 65 =
37. 37.65 × 34 =
38. 38.32 × 55 =
39. 39.22 × 15 =
40. 40.40 × 65 =

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