Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 111 · 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. 1.30 × 25 =
2. 2.12 × 55 =
3. 3.40 × 125 =
4. 4.75 × 8 =
5. 5.18 × 75 =
6. 6.30 × 65 =
7. 7.26 × 125 =
8. 8.38 × 75 =
9. 9.18 × 15 =
10. 10.35 × 16 =
11. 11.25 × 12 =
12. 12.125 × 22 =
13. 13.125 × 22 =
14. 14.12 × 45 =
15. 15.65 × 26 =
16. 16.26 × 125 =
17. 17.24 × 75 =
18. 18.65 × 22 =
19. 19.34 × 45 =
20. 20.65 × 26 =
21. 21.35 × 34 =
22. 22.12 × 55 =
23. 23.35 × 34 =
24. 24.45 × 6 =
25. 25.14 × 65 =
26. 26.125 × 36 =
27. 27.18 × 35 =
28. 28.10 × 125 =
29. 29.32 × 35 =
30. 30.65 × 14 =
31. 31.14 × 55 =
32. 32.28 × 15 =
33. 33.45 × 20 =
34. 34.15 × 32 =
35. 35.16 × 55 =
36. 36.35 × 6 =
37. 37.10 × 25 =
38. 38.24 × 75 =
39. 39.10 × 45 =
40. 40.26 × 65 =

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