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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 649 · 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. 1.27² =
  2. 2.18² =
  3. 3.17² =
  4. 4.22² =
  5. 5.29² =
  6. 6.13² =
  7. 7.21² =
  8. 8.15² =
  9. 9.25² =
  10. 10.23² =
  11. 11.14² =
  12. 12.19² =
  13. 13.11² =
  14. 14.24² =
  15. 15.12² =
  16. 16.28² =
  17. 17.21² =
  18. 18.15² =
  19. 19.24² =
  20. 20.26² =
  21. 21.16² =
  22. 22.15² =
  23. 23.18² =
  24. 24.29² =
  25. 25.11² =
  26. 26.17² =
  27. 27.17² =
  28. 28.12² =
  29. 29.16² =
  30. 30.21² =
  31. 31.11² =
  32. 32.14² =
  33. 33.21² =
  34. 34.15² =
  35. 35.13² =
  36. 36.23² =
  37. 37.19² =
  38. 38.15² =
  39. 39.18² =
  40. 40.21² =

Answer key

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

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