Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 222 · 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. 1.125 × 30 =
2. 2.25 × 30 =
3. 3.35 × 10 =
4. 4.25 × 6 =
5. 5.22 × 25 =
6. 6.25 × 10 =
7. 7.25 × 30 =
8. 8.10 × 125 =
9. 9.26 × 35 =
10. 10.16 × 25 =
11. 11.28 × 45 =
12. 12.75 × 12 =
13. 13.125 × 6 =
14. 14.15 × 10 =
15. 15.14 × 45 =
16. 16.40 × 25 =
17. 17.25 × 20 =
18. 18.55 × 8 =
19. 19.18 × 15 =
20. 20.16 × 15 =
21. 21.35 × 32 =
22. 22.14 × 15 =
23. 23.45 × 38 =
24. 24.10 × 35 =
25. 25.38 × 125 =
26. 26.8 × 65 =
27. 27.12 × 125 =
28. 28.65 × 28 =
29. 29.22 × 65 =
30. 30.75 × 12 =
31. 31.12 × 55 =
32. 32.125 × 26 =
33. 33.125 × 26 =
34. 34.34 × 75 =
35. 35.25 × 10 =
36. 36.36 × 65 =
37. 37.35 × 34 =
38. 38.30 × 45 =
39. 39.34 × 65 =
40. 40.45 × 20 =

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