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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 504 · 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. 1.15² =
  2. 2.11² =
  3. 3.21² =
  4. 4.12² =
  5. 5.28² =
  6. 6.19² =
  7. 7.29² =
  8. 8.25² =
  9. 9.27² =
  10. 10.26² =
  11. 11.17² =
  12. 12.23² =
  13. 13.16² =
  14. 14.14² =
  15. 15.24² =
  16. 16.13² =
  17. 17.22² =
  18. 18.18² =
  19. 19.25² =
  20. 20.18² =
  21. 21.28² =
  22. 22.29² =
  23. 23.15² =
  24. 24.29² =
  25. 25.15² =
  26. 26.27² =
  27. 27.21² =
  28. 28.28² =
  29. 29.17² =
  30. 30.29² =
  31. 31.25² =
  32. 32.13² =
  33. 33.24² =
  34. 34.16² =
  35. 35.12² =
  36. 36.15² =
  37. 37.13² =
  38. 38.12² =
  39. 39.15² =
  40. 40.23² =

Answer key

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

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