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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 221 · 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. 2.29² =
  3. 3.21² =
  4. 4.28² =
  5. 5.19² =
  6. 6.13² =
  7. 7.15² =
  8. 8.12² =
  9. 9.17² =
  10. 10.26² =
  11. 11.11² =
  12. 12.18² =
  13. 13.16² =
  14. 14.25² =
  15. 15.23² =
  16. 16.11² =
  17. 17.22² =
  18. 18.27² =
  19. 19.15² =
  20. 20.25² =
  21. 21.24² =
  22. 22.16² =
  23. 23.13² =
  24. 24.23² =
  25. 25.12² =
  26. 26.15² =
  27. 27.14² =
  28. 28.25² =
  29. 29.27² =
  30. 30.22² =
  31. 31.14² =
  32. 32.13² =
  33. 33.11² =
  34. 34.18² =
  35. 35.11² =
  36. 36.26² =
  37. 37.11² =
  38. 38.29² =
  39. 39.15² =
  40. 40.18² =

Answer key

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

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