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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 658 · 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. 1.26² =
  2. 2.21² =
  3. 3.29² =
  4. 4.16² =
  5. 5.14² =
  6. 6.23² =
  7. 7.28² =
  8. 8.22² =
  9. 9.27² =
  10. 10.18² =
  11. 11.17² =
  12. 12.13² =
  13. 13.24² =
  14. 14.11² =
  15. 15.19² =
  16. 16.21² =
  17. 17.15² =
  18. 18.25² =
  19. 19.12² =
  20. 20.26² =
  21. 21.21² =
  22. 22.21² =
  23. 23.12² =
  24. 24.25² =
  25. 25.29² =
  26. 26.17² =
  27. 27.11² =
  28. 28.22² =
  29. 29.12² =
  30. 30.25² =
  31. 31.12² =
  32. 32.15² =
  33. 33.15² =
  34. 34.29² =
  35. 35.23² =
  36. 36.28² =
  37. 37.22² =
  38. 38.29² =
  39. 39.11² =
  40. 40.18² =

Answer key

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

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