Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 665 · 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 × 6 =
2. 2.55 × 30 =
3. 3.55 × 28 =
4. 4.20 × 75 =
5. 5.65 × 34 =
6. 6.65 × 40 =
7. 7.25 × 8 =
8. 8.75 × 16 =
9. 9.28 × 55 =
10. 10.125 × 12 =
11. 11.16 × 25 =
12. 12.18 × 25 =
13. 13.34 × 15 =
14. 14.15 × 22 =
15. 15.26 × 65 =
16. 16.65 × 12 =
17. 17.12 × 75 =
18. 18.15 × 14 =
19. 19.15 × 14 =
20. 20.35 × 6 =
21. 21.55 × 28 =
22. 22.20 × 35 =
23. 23.38 × 25 =
24. 24.38 × 15 =
25. 25.10 × 65 =
26. 26.125 × 36 =
27. 27.15 × 30 =
28. 28.45 × 32 =
29. 29.65 × 38 =
30. 30.6 × 15 =
31. 31.36 × 15 =
32. 32.18 × 25 =
33. 33.75 × 6 =
34. 34.18 × 15 =
35. 35.15 × 8 =
36. 36.28 × 75 =
37. 37.55 × 40 =
38. 38.55 × 6 =
39. 39.125 × 12 =
40. 40.38 × 15 =

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