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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 777 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.25² =
  2. 2.24² =
  3. 3.27² =
  4. 4.19² =
  5. 5.17² =
  6. 6.15² =
  7. 7.22² =
  8. 8.11² =
  9. 9.21² =
  10. 10.26² =
  11. 11.23² =
  12. 12.28² =
  13. 13.13² =
  14. 14.29² =
  15. 15.18² =
  16. 16.16² =
  17. 17.14² =
  18. 18.25² =
  19. 19.11² =
  20. 20.21² =
  21. 21.12² =
  22. 22.15² =
  23. 23.27² =
  24. 24.12² =
  25. 25.23² =
  26. 26.21² =
  27. 27.15² =
  28. 28.23² =
  29. 29.25² =
  30. 30.11² =
  31. 31.28² =
  32. 32.24² =
  33. 33.19² =
  34. 34.21² =
  35. 35.15² =
  36. 36.23² =
  37. 37.24² =
  38. 38.14² =
  39. 39.13² =
  40. 40.18² =

Answer key

  1. 625
  2. 576
  3. 729
  4. 361
  5. 289
  6. 225
  7. 484
  8. 121
  9. 441
  10. 676
  11. 529
  12. 784
  13. 169
  14. 841
  15. 324
  16. 256
  17. 196
  18. 625
  19. 121
  20. 441
  21. 144
  22. 225
  23. 729
  24. 144
  25. 529
  26. 441
  27. 225
  28. 529
  29. 625
  30. 121
  31. 784
  32. 576
  33. 361
  34. 441
  35. 225
  36. 529
  37. 576
  38. 196
  39. 169
  40. 324

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