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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 612 · 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. 2.17² =
  3. 3.16² =
  4. 4.27² =
  5. 5.21² =
  6. 6.24² =
  7. 7.26² =
  8. 8.19² =
  9. 9.13² =
  10. 10.12² =
  11. 11.25² =
  12. 12.11² =
  13. 13.15² =
  14. 14.28² =
  15. 15.14² =
  16. 16.23² =
  17. 17.29² =
  18. 18.22² =
  19. 19.18² =
  20. 20.27² =
  21. 21.12² =
  22. 22.11² =
  23. 23.22² =
  24. 24.21² =
  25. 25.12² =
  26. 26.19² =
  27. 27.15² =
  28. 28.15² =
  29. 29.26² =
  30. 30.21² =
  31. 31.14² =
  32. 32.17² =
  33. 33.28² =
  34. 34.15² =
  35. 35.24² =
  36. 36.12² =
  37. 37.23² =
  38. 38.13² =
  39. 39.21² =
  40. 40.19² =

Answer key

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

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