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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 185 · 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. 2.27² =
  3. 3.24² =
  4. 4.21² =
  5. 5.17² =
  6. 6.15² =
  7. 7.22² =
  8. 8.23² =
  9. 9.13² =
  10. 10.18² =
  11. 11.19² =
  12. 12.12² =
  13. 13.26² =
  14. 14.25² =
  15. 15.29² =
  16. 16.16² =
  17. 17.25² =
  18. 18.14² =
  19. 19.28² =
  20. 20.23² =
  21. 21.15² =
  22. 22.22² =
  23. 23.16² =
  24. 24.12² =
  25. 25.21² =
  26. 26.19² =
  27. 27.21² =
  28. 28.25² =
  29. 29.29² =
  30. 30.21² =
  31. 31.22² =
  32. 32.18² =
  33. 33.13² =
  34. 34.14² =
  35. 35.24² =
  36. 36.13² =
  37. 37.29² =
  38. 38.14² =
  39. 39.16² =
  40. 40.18² =

Answer key

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

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