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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 266 · 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. 1.24² =
  2. 2.29² =
  3. 3.12² =
  4. 4.16² =
  5. 5.11² =
  6. 6.23² =
  7. 7.19² =
  8. 8.13² =
  9. 9.14² =
  10. 10.15² =
  11. 11.28² =
  12. 12.22² =
  13. 13.18² =
  14. 14.25² =
  15. 15.17² =
  16. 16.26² =
  17. 17.21² =
  18. 18.23² =
  19. 19.25² =
  20. 20.27² =
  21. 21.24² =
  22. 22.14² =
  23. 23.16² =
  24. 24.12² =
  25. 25.27² =
  26. 26.15² =
  27. 27.17² =
  28. 28.14² =
  29. 29.15² =
  30. 30.21² =
  31. 31.29² =
  32. 32.14² =
  33. 33.23² =
  34. 34.12² =
  35. 35.21² =
  36. 36.17² =
  37. 37.21² =
  38. 38.19² =
  39. 39.28² =
  40. 40.12² =

Answer key

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

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