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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 868 · 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. 2.13² =
  3. 3.18² =
  4. 4.21² =
  5. 5.11² =
  6. 6.14² =
  7. 7.23² =
  8. 8.28² =
  9. 9.24² =
  10. 10.15² =
  11. 11.29² =
  12. 12.26² =
  13. 13.17² =
  14. 14.12² =
  15. 15.21² =
  16. 16.27² =
  17. 17.22² =
  18. 18.25² =
  19. 19.15² =
  20. 20.19² =
  21. 21.21² =
  22. 22.11² =
  23. 23.21² =
  24. 24.25² =
  25. 25.17² =
  26. 26.27² =
  27. 27.27² =
  28. 28.28² =
  29. 29.15² =
  30. 30.14² =
  31. 31.29² =
  32. 32.11² =
  33. 33.17² =
  34. 34.29² =
  35. 35.11² =
  36. 36.12² =
  37. 37.12² =
  38. 38.12² =
  39. 39.26² =
  40. 40.14² =

Answer key

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

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