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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 204 · 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. 1.11² =
  2. 2.16² =
  3. 3.21² =
  4. 4.27² =
  5. 5.25² =
  6. 6.26² =
  7. 7.23² =
  8. 8.15² =
  9. 9.22² =
  10. 10.12² =
  11. 11.28² =
  12. 12.29² =
  13. 13.24² =
  14. 14.18² =
  15. 15.19² =
  16. 16.17² =
  17. 17.13² =
  18. 18.21² =
  19. 19.14² =
  20. 20.29² =
  21. 21.27² =
  22. 22.12² =
  23. 23.21² =
  24. 24.23² =
  25. 25.23² =
  26. 26.28² =
  27. 27.23² =
  28. 28.15² =
  29. 29.18² =
  30. 30.15² =
  31. 31.27² =
  32. 32.15² =
  33. 33.23² =
  34. 34.13² =
  35. 35.28² =
  36. 36.23² =
  37. 37.15² =
  38. 38.26² =
  39. 39.29² =
  40. 40.28² =

Answer key

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

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