Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 333 · 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 × 30 =
2. 2.75 × 12 =
3. 3.75 × 28 =
4. 4.15 × 20 =
5. 5.18 × 15 =
6. 6.26 × 15 =
7. 7.75 × 22 =
8. 8.15 × 6 =
9. 9.6 × 125 =
10. 10.45 × 22 =
11. 11.125 × 28 =
12. 12.12 × 25 =
13. 13.34 × 75 =
14. 14.12 × 35 =
15. 15.30 × 25 =
16. 16.15 × 6 =
17. 17.28 × 55 =
18. 18.16 × 35 =
19. 19.38 × 75 =
20. 20.45 × 36 =
21. 21.35 × 26 =
22. 22.32 × 25 =
23. 23.15 × 26 =
24. 24.55 × 40 =
25. 25.18 × 25 =
26. 26.125 × 30 =
27. 27.12 × 75 =
28. 28.38 × 45 =
29. 29.28 × 65 =
30. 30.24 × 125 =
31. 31.24 × 75 =
32. 32.34 × 15 =
33. 33.75 × 40 =
34. 34.18 × 55 =
35. 35.12 × 15 =
36. 36.25 × 20 =
37. 37.40 × 125 =
38. 38.65 × 40 =
39. 39.24 × 65 =
40. 40.12 × 75 =

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