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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 127 · 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. 1.16² =
  2. 2.23² =
  3. 3.21² =
  4. 4.27² =
  5. 5.12² =
  6. 6.29² =
  7. 7.26² =
  8. 8.19² =
  9. 9.18² =
  10. 10.15² =
  11. 11.24² =
  12. 12.11² =
  13. 13.22² =
  14. 14.13² =
  15. 15.28² =
  16. 16.25² =
  17. 17.17² =
  18. 18.18² =
  19. 19.25² =
  20. 20.14² =
  21. 21.12² =
  22. 22.15² =
  23. 23.29² =
  24. 24.13² =
  25. 25.28² =
  26. 26.21² =
  27. 27.18² =
  28. 28.19² =
  29. 29.29² =
  30. 30.29² =
  31. 31.12² =
  32. 32.16² =
  33. 33.23² =
  34. 34.25² =
  35. 35.24² =
  36. 36.28² =
  37. 37.15² =
  38. 38.23² =
  39. 39.19² =
  40. 40.23² =

Answer key

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

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