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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 298 · 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. 1.21² =
  2. 2.14² =
  3. 3.28² =
  4. 4.12² =
  5. 5.19² =
  6. 6.26² =
  7. 7.29² =
  8. 8.17² =
  9. 9.15² =
  10. 10.16² =
  11. 11.18² =
  12. 12.24² =
  13. 13.23² =
  14. 14.27² =
  15. 15.22² =
  16. 16.13² =
  17. 17.15² =
  18. 18.25² =
  19. 19.28² =
  20. 20.11² =
  21. 21.26² =
  22. 22.15² =
  23. 23.25² =
  24. 24.14² =
  25. 25.14² =
  26. 26.25² =
  27. 27.29² =
  28. 28.11² =
  29. 29.28² =
  30. 30.12² =
  31. 31.23² =
  32. 32.14² =
  33. 33.14² =
  34. 34.26² =
  35. 35.16² =
  36. 36.25² =
  37. 37.22² =
  38. 38.12² =
  39. 39.13² =
  40. 40.18² =

Answer key

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

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