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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 866 · 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. 1.16² =
  2. 2.27² =
  3. 3.25² =
  4. 4.17² =
  5. 5.19² =
  6. 6.14² =
  7. 7.18² =
  8. 8.26² =
  9. 9.24² =
  10. 10.15² =
  11. 11.13² =
  12. 12.29² =
  13. 13.11² =
  14. 14.21² =
  15. 15.22² =
  16. 16.12² =
  17. 17.26² =
  18. 18.15² =
  19. 19.28² =
  20. 20.12² =
  21. 21.25² =
  22. 22.17² =
  23. 23.22² =
  24. 24.19² =
  25. 25.26² =
  26. 26.23² =
  27. 27.24² =
  28. 28.13² =
  29. 29.18² =
  30. 30.23² =
  31. 31.22² =
  32. 32.17² =
  33. 33.21² =
  34. 34.24² =
  35. 35.25² =
  36. 36.27² =
  37. 37.17² =
  38. 38.21² =
  39. 39.21² =
  40. 40.15² =

Answer key

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

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