Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 611 · 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. 1.10 × 75 =
2. 2.125 × 34 =
3. 3.6 × 55 =
4. 4.36 × 65 =
5. 5.26 × 45 =
6. 6.36 × 35 =
7. 7.12 × 25 =
8. 8.22 × 65 =
9. 9.16 × 45 =
10. 10.26 × 15 =
11. 11.15 × 14 =
12. 12.16 × 45 =
13. 13.30 × 75 =
14. 14.15 × 40 =
15. 15.125 × 40 =
16. 16.36 × 125 =
17. 17.25 × 16 =
18. 18.26 × 75 =
19. 19.125 × 32 =
20. 20.25 × 24 =
21. 21.30 × 15 =
22. 22.65 × 28 =
23. 23.75 × 20 =
24. 24.75 × 26 =
25. 25.65 × 28 =
26. 26.26 × 45 =
27. 27.12 × 35 =
28. 28.75 × 10 =
29. 29.75 × 20 =
30. 30.32 × 15 =
31. 31.75 × 12 =
32. 32.6 × 125 =
33. 33.75 × 38 =
34. 34.15 × 8 =
35. 35.75 × 8 =
36. 36.14 × 25 =
37. 37.6 × 25 =
38. 38.18 × 15 =
39. 39.55 × 40 =
40. 40.8 × 35 =

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