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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 820 · 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. 1.14² =
  2. 2.23² =
  3. 3.29² =
  4. 4.21² =
  5. 5.13² =
  6. 6.27² =
  7. 7.12² =
  8. 8.28² =
  9. 9.15² =
  10. 10.24² =
  11. 11.25² =
  12. 12.26² =
  13. 13.18² =
  14. 14.17² =
  15. 15.22² =
  16. 16.19² =
  17. 17.23² =
  18. 18.16² =
  19. 19.11² =
  20. 20.14² =
  21. 21.21² =
  22. 22.21² =
  23. 23.17² =
  24. 24.12² =
  25. 25.14² =
  26. 26.14² =
  27. 27.12² =
  28. 28.19² =
  29. 29.25² =
  30. 30.18² =
  31. 31.13² =
  32. 32.26² =
  33. 33.21² =
  34. 34.17² =
  35. 35.13² =
  36. 36.21² =
  37. 37.16² =
  38. 38.29² =
  39. 39.18² =
  40. 40.18² =

Answer key

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

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