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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 561 · 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. 2.15² =
  3. 3.28² =
  4. 4.27² =
  5. 5.12² =
  6. 6.17² =
  7. 7.23² =
  8. 8.16² =
  9. 9.11² =
  10. 10.18² =
  11. 11.21² =
  12. 12.19² =
  13. 13.14² =
  14. 14.26² =
  15. 15.25² =
  16. 16.22² =
  17. 17.24² =
  18. 18.14² =
  19. 19.29² =
  20. 20.17² =
  21. 21.17² =
  22. 22.24² =
  23. 23.15² =
  24. 24.26² =
  25. 25.14² =
  26. 26.23² =
  27. 27.15² =
  28. 28.21² =
  29. 29.14² =
  30. 30.16² =
  31. 31.18² =
  32. 32.22² =
  33. 33.26² =
  34. 34.25² =
  35. 35.12² =
  36. 36.21² =
  37. 37.29² =
  38. 38.23² =
  39. 39.15² =
  40. 40.29² =

Answer key

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

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