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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 722 · 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. 2.21² =
  3. 3.13² =
  4. 4.11² =
  5. 5.22² =
  6. 6.19² =
  7. 7.29² =
  8. 8.15² =
  9. 9.25² =
  10. 10.16² =
  11. 11.12² =
  12. 12.17² =
  13. 13.28² =
  14. 14.23² =
  15. 15.26² =
  16. 16.27² =
  17. 17.14² =
  18. 18.29² =
  19. 19.18² =
  20. 20.21² =
  21. 21.22² =
  22. 22.28² =
  23. 23.26² =
  24. 24.12² =
  25. 25.12² =
  26. 26.11² =
  27. 27.13² =
  28. 28.23² =
  29. 29.21² =
  30. 30.18² =
  31. 31.14² =
  32. 32.15² =
  33. 33.13² =
  34. 34.11² =
  35. 35.23² =
  36. 36.21² =
  37. 37.15² =
  38. 38.25² =
  39. 39.15² =
  40. 40.18² =

Answer key

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

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