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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 471 · 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. 2.19² =
  3. 3.17² =
  4. 4.27² =
  5. 5.12² =
  6. 6.24² =
  7. 7.26² =
  8. 8.21² =
  9. 9.29² =
  10. 10.28² =
  11. 11.13² =
  12. 12.11² =
  13. 13.14² =
  14. 14.16² =
  15. 15.25² =
  16. 16.22² =
  17. 17.23² =
  18. 18.15² =
  19. 19.13² =
  20. 20.13² =
  21. 21.26² =
  22. 22.26² =
  23. 23.28² =
  24. 24.14² =
  25. 25.11² =
  26. 26.28² =
  27. 27.18² =
  28. 28.11² =
  29. 29.12² =
  30. 30.17² =
  31. 31.26² =
  32. 32.17² =
  33. 33.13² =
  34. 34.12² =
  35. 35.23² =
  36. 36.11² =
  37. 37.23² =
  38. 38.25² =
  39. 39.17² =
  40. 40.17² =

Answer key

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

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