Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 174 · 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. 1.55 × 8 =
2. 2.35 × 22 =
3. 3.15 × 30 =
4. 4.55 × 8 =
5. 5.45 × 24 =
6. 6.30 × 35 =
7. 7.65 × 32 =
8. 8.15 × 26 =
9. 9.75 × 12 =
10. 10.35 × 10 =
11. 11.65 × 18 =
12. 12.18 × 25 =
13. 13.30 × 125 =
14. 14.28 × 75 =
15. 15.12 × 25 =
16. 16.45 × 36 =
17. 17.8 × 125 =
18. 18.10 × 15 =
19. 19.24 × 75 =
20. 20.25 × 6 =
21. 21.55 × 16 =
22. 22.15 × 38 =
23. 23.45 × 36 =
24. 24.32 × 125 =
25. 25.35 × 18 =
26. 26.125 × 6 =
27. 27.15 × 38 =
28. 28.75 × 16 =
29. 29.55 × 8 =
30. 30.18 × 75 =
31. 31.15 × 14 =
32. 32.38 × 45 =
33. 33.40 × 35 =
34. 34.36 × 45 =
35. 35.65 × 30 =
36. 36.45 × 26 =
37. 37.35 × 32 =
38. 38.35 × 30 =
39. 39.36 × 125 =
40. 40.14 × 25 =

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