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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 618 · 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. 1.17² =
  2. 2.16² =
  3. 3.23² =
  4. 4.27² =
  5. 5.25² =
  6. 6.24² =
  7. 7.18² =
  8. 8.28² =
  9. 9.22² =
  10. 10.21² =
  11. 11.29² =
  12. 12.13² =
  13. 13.15² =
  14. 14.12² =
  15. 15.26² =
  16. 16.11² =
  17. 17.14² =
  18. 18.26² =
  19. 19.19² =
  20. 20.28² =
  21. 21.21² =
  22. 22.15² =
  23. 23.21² =
  24. 24.13² =
  25. 25.16² =
  26. 26.11² =
  27. 27.23² =
  28. 28.15² =
  29. 29.24² =
  30. 30.19² =
  31. 31.15² =
  32. 32.21² =
  33. 33.28² =
  34. 34.13² =
  35. 35.22² =
  36. 36.19² =
  37. 37.16² =
  38. 38.12² =
  39. 39.15² =
  40. 40.12² =

Answer key

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

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