Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 8 · 40 questions

The fast method (From 25 and the gap): Find the gap from 50: 53 is 50 + 3, 46 is 50 − 4. First part: 25 + gap above 50, or 25 − gap below 50. Last two digits: the gap squared, written as 2 digits — 3² = 09. Join them: 53² = 28|09 = 2809.

1. 1.45² =
2. 2.47² =
3. 3.59² =
4. 4.51² =
5. 5.48² =
6. 6.43² =
7. 7.49² =
8. 8.55² =
9. 9.43² =
10. 10.43² =
11. 11.58² =
12. 12.44² =
13. 13.41² =
14. 14.54² =
15. 15.45² =
16. 16.53² =
17. 17.48² =
18. 18.54² =
19. 19.45² =
20. 20.44² =
21. 21.56² =
22. 22.51² =
23. 23.46² =
24. 24.54² =
25. 25.48² =
26. 26.49² =
27. 27.53² =
28. 28.59² =
29. 29.45² =
30. 30.45² =
31. 31.41² =
32. 32.45² =
33. 33.49² =
34. 34.58² =
35. 35.49² =
36. 36.46² =
37. 37.41² =
38. 38.49² =
39. 39.59² =
40. 40.52² =

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