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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 33 · 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. 1.15² =
  2. 2.21² =
  3. 3.17² =
  4. 4.25² =
  5. 5.29² =
  6. 6.14² =
  7. 7.12² =
  8. 8.28² =
  9. 9.16² =
  10. 10.13² =
  11. 11.27² =
  12. 12.19² =
  13. 13.11² =
  14. 14.22² =
  15. 15.23² =
  16. 16.18² =
  17. 17.26² =
  18. 18.12² =
  19. 19.17² =
  20. 20.15² =
  21. 21.29² =
  22. 22.24² =
  23. 23.28² =
  24. 24.12² =
  25. 25.28² =
  26. 26.21² =
  27. 27.18² =
  28. 28.26² =
  29. 29.26² =
  30. 30.21² =
  31. 31.25² =
  32. 32.26² =
  33. 33.22² =
  34. 34.21² =
  35. 35.18² =
  36. 36.16² =
  37. 37.23² =
  38. 38.15² =
  39. 39.26² =
  40. 40.17² =

Answer key

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

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