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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 812 · 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. 1.18² =
  2. 2.26² =
  3. 3.23² =
  4. 4.22² =
  5. 5.17² =
  6. 6.21² =
  7. 7.28² =
  8. 8.15² =
  9. 9.16² =
  10. 10.29² =
  11. 11.25² =
  12. 12.11² =
  13. 13.14² =
  14. 14.21² =
  15. 15.27² =
  16. 16.12² =
  17. 17.15² =
  18. 18.24² =
  19. 19.13² =
  20. 20.24² =
  21. 21.15² =
  22. 22.11² =
  23. 23.23² =
  24. 24.27² =
  25. 25.19² =
  26. 26.29² =
  27. 27.14² =
  28. 28.15² =
  29. 29.21² =
  30. 30.28² =
  31. 31.16² =
  32. 32.23² =
  33. 33.13² =
  34. 34.15² =
  35. 35.17² =
  36. 36.18² =
  37. 37.14² =
  38. 38.11² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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