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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 295 · 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. 1.23² =
  2. 2.17² =
  3. 3.27² =
  4. 4.19² =
  5. 5.22² =
  6. 6.26² =
  7. 7.13² =
  8. 8.28² =
  9. 9.18² =
  10. 10.12² =
  11. 11.29² =
  12. 12.21² =
  13. 13.14² =
  14. 14.24² =
  15. 15.11² =
  16. 16.26² =
  17. 17.21² =
  18. 18.25² =
  19. 19.15² =
  20. 20.22² =
  21. 21.21² =
  22. 22.16² =
  23. 23.29² =
  24. 24.21² =
  25. 25.23² =
  26. 26.21² =
  27. 27.17² =
  28. 28.11² =
  29. 29.28² =
  30. 30.14² =
  31. 31.14² =
  32. 32.21² =
  33. 33.11² =
  34. 34.17² =
  35. 35.28² =
  36. 36.28² =
  37. 37.26² =
  38. 38.24² =
  39. 39.29² =
  40. 40.24² =

Answer key

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

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