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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 28 · 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. 1.11² =
  2. 2.21² =
  3. 3.13² =
  4. 4.23² =
  5. 5.25² =
  6. 6.16² =
  7. 7.24² =
  8. 8.12² =
  9. 9.27² =
  10. 10.15² =
  11. 11.17² =
  12. 12.14² =
  13. 13.29² =
  14. 14.22² =
  15. 15.18² =
  16. 16.19² =
  17. 17.28² =
  18. 18.26² =
  19. 19.11² =
  20. 20.29² =
  21. 21.26² =
  22. 22.21² =
  23. 23.27² =
  24. 24.14² =
  25. 25.23² =
  26. 26.18² =
  27. 27.24² =
  28. 28.23² =
  29. 29.14² =
  30. 30.25² =
  31. 31.11² =
  32. 32.26² =
  33. 33.11² =
  34. 34.12² =
  35. 35.12² =
  36. 36.15² =
  37. 37.21² =
  38. 38.17² =
  39. 39.15² =
  40. 40.23² =

Answer key

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

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