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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 499 · 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. 1.28² =
  2. 2.15² =
  3. 3.16² =
  4. 4.22² =
  5. 5.24² =
  6. 6.13² =
  7. 7.12² =
  8. 8.19² =
  9. 9.27² =
  10. 10.21² =
  11. 11.11² =
  12. 12.26² =
  13. 13.23² =
  14. 14.14² =
  15. 15.17² =
  16. 16.25² =
  17. 17.18² =
  18. 18.23² =
  19. 19.29² =
  20. 20.19² =
  21. 21.14² =
  22. 22.23² =
  23. 23.15² =
  24. 24.15² =
  25. 25.16² =
  26. 26.21² =
  27. 27.13² =
  28. 28.25² =
  29. 29.21² =
  30. 30.21² =
  31. 31.23² =
  32. 32.15² =
  33. 33.29² =
  34. 34.26² =
  35. 35.29² =
  36. 36.19² =
  37. 37.16² =
  38. 38.12² =
  39. 39.21² =
  40. 40.24² =

Answer key

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

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