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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 256 · 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. 1.25² =
  2. 2.29² =
  3. 3.18² =
  4. 4.15² =
  5. 5.23² =
  6. 6.22² =
  7. 7.14² =
  8. 8.21² =
  9. 9.26² =
  10. 10.19² =
  11. 11.17² =
  12. 12.16² =
  13. 13.11² =
  14. 14.13² =
  15. 15.28² =
  16. 16.27² =
  17. 17.24² =
  18. 18.25² =
  19. 19.26² =
  20. 20.11² =
  21. 21.12² =
  22. 22.28² =
  23. 23.25² =
  24. 24.28² =
  25. 25.15² =
  26. 26.29² =
  27. 27.21² =
  28. 28.15² =
  29. 29.29² =
  30. 30.14² =
  31. 31.28² =
  32. 32.22² =
  33. 33.11² =
  34. 34.25² =
  35. 35.21² =
  36. 36.18² =
  37. 37.15² =
  38. 38.14² =
  39. 39.25² =
  40. 40.27² =

Answer key

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

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