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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 528 · 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. 2.22² =
  3. 3.29² =
  4. 4.26² =
  5. 5.24² =
  6. 6.15² =
  7. 7.12² =
  8. 8.23² =
  9. 9.17² =
  10. 10.28² =
  11. 11.19² =
  12. 12.25² =
  13. 13.21² =
  14. 14.13² =
  15. 15.16² =
  16. 16.18² =
  17. 17.14² =
  18. 18.12² =
  19. 19.27² =
  20. 20.11² =
  21. 21.14² =
  22. 22.17² =
  23. 23.24² =
  24. 24.25² =
  25. 25.28² =
  26. 26.18² =
  27. 27.26² =
  28. 28.29² =
  29. 29.28² =
  30. 30.15² =
  31. 31.29² =
  32. 32.28² =
  33. 33.11² =
  34. 34.15² =
  35. 35.19² =
  36. 36.12² =
  37. 37.23² =
  38. 38.13² =
  39. 39.21² =
  40. 40.18² =

Answer key

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

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