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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 595 · 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. 1.24² =
  2. 2.19² =
  3. 3.29² =
  4. 4.28² =
  5. 5.14² =
  6. 6.11² =
  7. 7.17² =
  8. 8.18² =
  9. 9.21² =
  10. 10.22² =
  11. 11.15² =
  12. 12.12² =
  13. 13.23² =
  14. 14.27² =
  15. 15.25² =
  16. 16.13² =
  17. 17.16² =
  18. 18.24² =
  19. 19.15² =
  20. 20.26² =
  21. 21.17² =
  22. 22.12² =
  23. 23.21² =
  24. 24.27² =
  25. 25.26² =
  26. 26.18² =
  27. 27.15² =
  28. 28.28² =
  29. 29.16² =
  30. 30.17² =
  31. 31.19² =
  32. 32.16² =
  33. 33.19² =
  34. 34.21² =
  35. 35.26² =
  36. 36.15² =
  37. 37.22² =
  38. 38.23² =
  39. 39.14² =
  40. 40.13² =

Answer key

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

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