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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 556 · 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. 1.27² =
  2. 2.25² =
  3. 3.11² =
  4. 4.12² =
  5. 5.18² =
  6. 6.16² =
  7. 7.29² =
  8. 8.13² =
  9. 9.19² =
  10. 10.24² =
  11. 11.22² =
  12. 12.14² =
  13. 13.28² =
  14. 14.23² =
  15. 15.21² =
  16. 16.17² =
  17. 17.26² =
  18. 18.16² =
  19. 19.15² =
  20. 20.17² =
  21. 21.27² =
  22. 22.11² =
  23. 23.14² =
  24. 24.25² =
  25. 25.17² =
  26. 26.18² =
  27. 27.27² =
  28. 28.11² =
  29. 29.26² =
  30. 30.25² =
  31. 31.19² =
  32. 32.17² =
  33. 33.21² =
  34. 34.21² =
  35. 35.21² =
  36. 36.11² =
  37. 37.15² =
  38. 38.29² =
  39. 39.18² =
  40. 40.19² =

Answer key

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

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