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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 166 · 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. 1.15² =
  2. 2.23² =
  3. 3.25² =
  4. 4.11² =
  5. 5.21² =
  6. 6.24² =
  7. 7.22² =
  8. 8.13² =
  9. 9.27² =
  10. 10.18² =
  11. 11.17² =
  12. 12.26² =
  13. 13.16² =
  14. 14.19² =
  15. 15.14² =
  16. 16.12² =
  17. 17.18² =
  18. 18.28² =
  19. 19.29² =
  20. 20.19² =
  21. 21.23² =
  22. 22.28² =
  23. 23.12² =
  24. 24.21² =
  25. 25.25² =
  26. 26.13² =
  27. 27.15² =
  28. 28.14² =
  29. 29.12² =
  30. 30.19² =
  31. 31.11² =
  32. 32.21² =
  33. 33.29² =
  34. 34.27² =
  35. 35.21² =
  36. 36.21² =
  37. 37.14² =
  38. 38.24² =
  39. 39.16² =
  40. 40.23² =

Answer key

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

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