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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 796 · 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. 1.14² =
  2. 2.11² =
  3. 3.26² =
  4. 4.25² =
  5. 5.22² =
  6. 6.28² =
  7. 7.23² =
  8. 8.17² =
  9. 9.21² =
  10. 10.18² =
  11. 11.15² =
  12. 12.12² =
  13. 13.19² =
  14. 14.29² =
  15. 15.25² =
  16. 16.13² =
  17. 17.27² =
  18. 18.16² =
  19. 19.24² =
  20. 20.21² =
  21. 21.28² =
  22. 22.28² =
  23. 23.18² =
  24. 24.21² =
  25. 25.26² =
  26. 26.17² =
  27. 27.23² =
  28. 28.25² =
  29. 29.21² =
  30. 30.22² =
  31. 31.21² =
  32. 32.15² =
  33. 33.11² =
  34. 34.29² =
  35. 35.17² =
  36. 36.19² =
  37. 37.16² =
  38. 38.23² =
  39. 39.11² =
  40. 40.29² =

Answer key

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

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