Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 369 · 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 × 26 =
2. 2.75 × 14 =
3. 3.35 × 36 =
4. 4.75 × 10 =
5. 5.125 × 40 =
6. 6.25 × 12 =
7. 7.55 × 18 =
8. 8.18 × 15 =
9. 9.18 × 15 =
10. 10.25 × 18 =
11. 11.30 × 125 =
12. 12.45 × 10 =
13. 13.28 × 55 =
14. 14.75 × 14 =
15. 15.125 × 14 =
16. 16.125 × 6 =
17. 17.75 × 34 =
18. 18.25 × 32 =
19. 19.35 × 32 =
20. 20.125 × 20 =
21. 21.15 × 12 =
22. 22.75 × 28 =
23. 23.45 × 40 =
24. 24.16 × 125 =
25. 25.35 × 22 =
26. 26.15 × 8 =
27. 27.32 × 65 =
28. 28.55 × 24 =
29. 29.8 × 65 =
30. 30.38 × 65 =
31. 31.65 × 40 =
32. 32.14 × 65 =
33. 33.30 × 25 =
34. 34.45 × 12 =
35. 35.65 × 40 =
36. 36.22 × 45 =
37. 37.34 × 55 =
38. 38.75 × 32 =
39. 39.12 × 35 =
40. 40.12 × 65 =

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