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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 552 · 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. 2.22² =
  3. 3.25² =
  4. 4.11² =
  5. 5.15² =
  6. 6.14² =
  7. 7.23² =
  8. 8.17² =
  9. 9.29² =
  10. 10.21² =
  11. 11.12² =
  12. 12.26² =
  13. 13.27² =
  14. 14.28² =
  15. 15.13² =
  16. 16.24² =
  17. 17.19² =
  18. 18.23² =
  19. 19.18² =
  20. 20.15² =
  21. 21.28² =
  22. 22.11² =
  23. 23.21² =
  24. 24.24² =
  25. 25.13² =
  26. 26.24² =
  27. 27.12² =
  28. 28.21² =
  29. 29.15² =
  30. 30.29² =
  31. 31.15² =
  32. 32.28² =
  33. 33.21² =
  34. 34.13² =
  35. 35.15² =
  36. 36.12² =
  37. 37.14² =
  38. 38.18² =
  39. 39.13² =
  40. 40.12² =

Answer key

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

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