Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 6 · 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 × 55 =
2. 2.24 × 25 =
3. 3.25 × 34 =
4. 4.125 × 10 =
5. 5.30 × 25 =
6. 6.65 × 12 =
7. 7.26 × 55 =
8. 8.20 × 25 =
9. 9.18 × 55 =
10. 10.34 × 35 =
11. 11.38 × 15 =
12. 12.14 × 125 =
13. 13.35 × 34 =
14. 14.45 × 24 =
15. 15.65 × 8 =
16. 16.25 × 26 =
17. 17.8 × 65 =
18. 18.65 × 14 =
19. 19.35 × 18 =
20. 20.35 × 10 =
21. 21.35 × 30 =
22. 22.125 × 8 =
23. 23.40 × 45 =
24. 24.55 × 10 =
25. 25.65 × 18 =
26. 26.14 × 75 =
27. 27.45 × 22 =
28. 28.55 × 26 =
29. 29.25 × 14 =
30. 30.25 × 22 =
31. 31.30 × 35 =
32. 32.35 × 30 =
33. 33.22 × 75 =
34. 34.6 × 55 =
35. 35.75 × 40 =
36. 36.55 × 8 =
37. 37.14 × 45 =
38. 38.26 × 125 =
39. 39.28 × 15 =
40. 40.10 × 35 =

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