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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 485 · 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. 1.25² =
  2. 2.19² =
  3. 3.18² =
  4. 4.23² =
  5. 5.27² =
  6. 6.21² =
  7. 7.22² =
  8. 8.16² =
  9. 9.13² =
  10. 10.14² =
  11. 11.12² =
  12. 12.26² =
  13. 13.17² =
  14. 14.28² =
  15. 15.15² =
  16. 16.24² =
  17. 17.11² =
  18. 18.28² =
  19. 19.26² =
  20. 20.14² =
  21. 21.29² =
  22. 22.11² =
  23. 23.13² =
  24. 24.22² =
  25. 25.21² =
  26. 26.18² =
  27. 27.26² =
  28. 28.15² =
  29. 29.14² =
  30. 30.24² =
  31. 31.29² =
  32. 32.11² =
  33. 33.21² =
  34. 34.14² =
  35. 35.28² =
  36. 36.15² =
  37. 37.28² =
  38. 38.17² =
  39. 39.15² =
  40. 40.13² =

Answer key

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

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