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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 502 · 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. 1.29² =
  2. 2.12² =
  3. 3.15² =
  4. 4.16² =
  5. 5.14² =
  6. 6.27² =
  7. 7.21² =
  8. 8.17² =
  9. 9.22² =
  10. 10.11² =
  11. 11.13² =
  12. 12.26² =
  13. 13.19² =
  14. 14.18² =
  15. 15.23² =
  16. 16.24² =
  17. 17.28² =
  18. 18.25² =
  19. 19.17² =
  20. 20.12² =
  21. 21.14² =
  22. 22.12² =
  23. 23.12² =
  24. 24.14² =
  25. 25.21² =
  26. 26.21² =
  27. 27.13² =
  28. 28.29² =
  29. 29.28² =
  30. 30.21² =
  31. 31.22² =
  32. 32.19² =
  33. 33.12² =
  34. 34.12² =
  35. 35.14² =
  36. 36.12² =
  37. 37.11² =
  38. 38.22² =
  39. 39.24² =
  40. 40.18² =

Answer key

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

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