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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 817 · 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. 1.29² =
  2. 2.26² =
  3. 3.27² =
  4. 4.11² =
  5. 5.21² =
  6. 6.13² =
  7. 7.17² =
  8. 8.18² =
  9. 9.12² =
  10. 10.14² =
  11. 11.25² =
  12. 12.26² =
  13. 13.22² =
  14. 14.19² =
  15. 15.15² =
  16. 16.23² =
  17. 17.24² =
  18. 18.28² =
  19. 19.14² =
  20. 20.16² =
  21. 21.21² =
  22. 22.11² =
  23. 23.17² =
  24. 24.27² =
  25. 25.27² =
  26. 26.19² =
  27. 27.28² =
  28. 28.12² =
  29. 29.15² =
  30. 30.18² =
  31. 31.26² =
  32. 32.14² =
  33. 33.13² =
  34. 34.23² =
  35. 35.19² =
  36. 36.22² =
  37. 37.21² =
  38. 38.27² =
  39. 39.28² =
  40. 40.18² =

Answer key

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

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