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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 396 · 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. 1.18² =
  2. 2.17² =
  3. 3.26² =
  4. 4.21² =
  5. 5.13² =
  6. 6.15² =
  7. 7.19² =
  8. 8.28² =
  9. 9.12² =
  10. 10.27² =
  11. 11.11² =
  12. 12.25² =
  13. 13.14² =
  14. 14.29² =
  15. 15.16² =
  16. 16.23² =
  17. 17.12² =
  18. 18.12² =
  19. 19.24² =
  20. 20.29² =
  21. 21.22² =
  22. 22.15² =
  23. 23.21² =
  24. 24.17² =
  25. 25.26² =
  26. 26.29² =
  27. 27.11² =
  28. 28.12² =
  29. 29.15² =
  30. 30.18² =
  31. 31.19² =
  32. 32.14² =
  33. 33.22² =
  34. 34.28² =
  35. 35.25² =
  36. 36.16² =
  37. 37.17² =
  38. 38.15² =
  39. 39.18² =
  40. 40.22² =

Answer key

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

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