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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 804 · 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. 1.13² =
  2. 2.16² =
  3. 3.22² =
  4. 4.19² =
  5. 5.15² =
  6. 6.11² =
  7. 7.21² =
  8. 8.12² =
  9. 9.24² =
  10. 10.18² =
  11. 11.14² =
  12. 12.23² =
  13. 13.28² =
  14. 14.27² =
  15. 15.17² =
  16. 16.29² =
  17. 17.26² =
  18. 18.25² =
  19. 19.28² =
  20. 20.15² =
  21. 21.27² =
  22. 22.12² =
  23. 23.14² =
  24. 24.15² =
  25. 25.21² =
  26. 26.28² =
  27. 27.12² =
  28. 28.12² =
  29. 29.17² =
  30. 30.22² =
  31. 31.18² =
  32. 32.21² =
  33. 33.12² =
  34. 34.22² =
  35. 35.15² =
  36. 36.24² =
  37. 37.15² =
  38. 38.11² =
  39. 39.14² =
  40. 40.22² =

Answer key

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

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