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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 277 · 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. 1.18² =
  2. 2.11² =
  3. 3.16² =
  4. 4.21² =
  5. 5.13² =
  6. 6.26² =
  7. 7.27² =
  8. 8.15² =
  9. 9.19² =
  10. 10.29² =
  11. 11.17² =
  12. 12.23² =
  13. 13.24² =
  14. 14.14² =
  15. 15.28² =
  16. 16.25² =
  17. 17.12² =
  18. 18.26² =
  19. 19.22² =
  20. 20.28² =
  21. 21.23² =
  22. 22.14² =
  23. 23.17² =
  24. 24.15² =
  25. 25.12² =
  26. 26.28² =
  27. 27.13² =
  28. 28.26² =
  29. 29.18² =
  30. 30.11² =
  31. 31.13² =
  32. 32.26² =
  33. 33.25² =
  34. 34.25² =
  35. 35.15² =
  36. 36.19² =
  37. 37.16² =
  38. 38.16² =
  39. 39.16² =
  40. 40.14² =

Answer key

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

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