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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 414 · 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. 1.26² =
  2. 2.13² =
  3. 3.18² =
  4. 4.12² =
  5. 5.16² =
  6. 6.27² =
  7. 7.29² =
  8. 8.22² =
  9. 9.24² =
  10. 10.17² =
  11. 11.15² =
  12. 12.28² =
  13. 13.19² =
  14. 14.11² =
  15. 15.28² =
  16. 16.14² =
  17. 17.25² =
  18. 18.21² =
  19. 19.11² =
  20. 20.18² =
  21. 21.17² =
  22. 22.23² =
  23. 23.25² =
  24. 24.15² =
  25. 25.26² =
  26. 26.14² =
  27. 27.28² =
  28. 28.15² =
  29. 29.21² =
  30. 30.18² =
  31. 31.18² =
  32. 32.23² =
  33. 33.17² =
  34. 34.23² =
  35. 35.22² =
  36. 36.26² =
  37. 37.18² =
  38. 38.18² =
  39. 39.16² =
  40. 40.29² =

Answer key

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

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