Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 573 · 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 × 10 =
2. 2.36 × 35 =
3. 3.26 × 15 =
4. 4.18 × 15 =
5. 5.10 × 35 =
6. 6.15 × 32 =
7. 7.38 × 45 =
8. 8.125 × 22 =
9. 9.75 × 28 =
10. 10.34 × 45 =
11. 11.75 × 6 =
12. 12.12 × 15 =
13. 13.10 × 65 =
14. 14.75 × 6 =
15. 15.15 × 22 =
16. 16.36 × 65 =
17. 17.8 × 125 =
18. 18.36 × 55 =
19. 19.16 × 55 =
20. 20.28 × 25 =
21. 21.24 × 15 =
22. 22.26 × 55 =
23. 23.26 × 35 =
24. 24.15 × 12 =
25. 25.14 × 35 =
26. 26.45 × 22 =
27. 27.35 × 6 =
28. 28.15 × 10 =
29. 29.34 × 75 =
30. 30.28 × 35 =
31. 31.15 × 12 =
32. 32.45 × 26 =
33. 33.38 × 15 =
34. 34.40 × 55 =
35. 35.36 × 25 =
36. 36.55 × 6 =
37. 37.24 × 25 =
38. 38.34 × 25 =
39. 39.6 × 25 =
40. 40.65 × 32 =

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