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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 749 · 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. 1.13² =
  2. 2.22² =
  3. 3.21² =
  4. 4.17² =
  5. 5.23² =
  6. 6.24² =
  7. 7.12² =
  8. 8.19² =
  9. 9.11² =
  10. 10.18² =
  11. 11.14² =
  12. 12.25² =
  13. 13.26² =
  14. 14.29² =
  15. 15.16² =
  16. 16.28² =
  17. 17.15² =
  18. 18.17² =
  19. 19.27² =
  20. 20.12² =
  21. 21.28² =
  22. 22.23² =
  23. 23.13² =
  24. 24.12² =
  25. 25.12² =
  26. 26.29² =
  27. 27.12² =
  28. 28.24² =
  29. 29.21² =
  30. 30.11² =
  31. 31.21² =
  32. 32.14² =
  33. 33.14² =
  34. 34.18² =
  35. 35.15² =
  36. 36.21² =
  37. 37.28² =
  38. 38.26² =
  39. 39.11² =
  40. 40.12² =

Answer key

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

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