Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 373 · 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. 1.75 × 30 =
2. 2.55 × 6 =
3. 3.34 × 55 =
4. 4.12 × 55 =
5. 5.55 × 10 =
6. 6.15 × 14 =
7. 7.35 × 10 =
8. 8.45 × 30 =
9. 9.34 × 45 =
10. 10.45 × 38 =
11. 11.75 × 30 =
12. 12.20 × 75 =
13. 13.10 × 15 =
14. 14.15 × 6 =
15. 15.20 × 125 =
16. 16.55 × 36 =
17. 17.65 × 24 =
18. 18.15 × 6 =
19. 19.35 × 28 =
20. 20.32 × 25 =
21. 21.30 × 45 =
22. 22.12 × 25 =
23. 23.24 × 15 =
24. 24.28 × 55 =
25. 25.55 × 12 =
26. 26.8 × 25 =
27. 27.38 × 25 =
28. 28.6 × 45 =
29. 29.16 × 65 =
30. 30.15 × 24 =
31. 31.45 × 8 =
32. 32.16 × 45 =
33. 33.38 × 25 =
34. 34.34 × 75 =
35. 35.75 × 28 =
36. 36.26 × 55 =
37. 37.75 × 16 =
38. 38.55 × 38 =
39. 39.14 × 65 =
40. 40.30 × 25 =

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