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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 663 · 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. 1.19² =
  2. 2.12² =
  3. 3.21² =
  4. 4.14² =
  5. 5.11² =
  6. 6.28² =
  7. 7.18² =
  8. 8.25² =
  9. 9.24² =
  10. 10.15² =
  11. 11.16² =
  12. 12.22² =
  13. 13.26² =
  14. 14.13² =
  15. 15.22² =
  16. 16.12² =
  17. 17.29² =
  18. 18.17² =
  19. 19.18² =
  20. 20.25² =
  21. 21.23² =
  22. 22.17² =
  23. 23.21² =
  24. 24.27² =
  25. 25.14² =
  26. 26.28² =
  27. 27.12² =
  28. 28.23² =
  29. 29.23² =
  30. 30.15² =
  31. 31.15² =
  32. 32.21² =
  33. 33.15² =
  34. 34.21² =
  35. 35.24² =
  36. 36.25² =
  37. 37.17² =
  38. 38.13² =
  39. 39.23² =
  40. 40.16² =

Answer key

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

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