Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 864 · 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. 1.15 × 30 =
2. 2.24 × 15 =
3. 3.15 × 8 =
4. 4.25 × 28 =
5. 5.35 × 18 =
6. 6.36 × 15 =
7. 7.75 × 36 =
8. 8.125 × 6 =
9. 9.18 × 75 =
10. 10.75 × 32 =
11. 11.65 × 34 =
12. 12.14 × 65 =
13. 13.25 × 30 =
14. 14.26 × 55 =
15. 15.125 × 12 =
16. 16.38 × 55 =
17. 17.125 × 30 =
18. 18.14 × 35 =
19. 19.35 × 38 =
20. 20.65 × 18 =
21. 21.16 × 35 =
22. 22.8 × 75 =
23. 23.25 × 28 =
24. 24.24 × 15 =
25. 25.55 × 40 =
26. 26.34 × 125 =
27. 27.75 × 32 =
28. 28.25 × 20 =
29. 29.16 × 15 =
30. 30.35 × 34 =
31. 31.8 × 55 =
32. 32.25 × 34 =
33. 33.14 × 15 =
34. 34.35 × 26 =
35. 35.12 × 35 =
36. 36.75 × 26 =
37. 37.14 × 35 =
38. 38.34 × 15 =
39. 39.20 × 25 =
40. 40.125 × 6 =

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