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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 92 · 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. 2.19² =
  3. 3.21² =
  4. 4.29² =
  5. 5.22² =
  6. 6.24² =
  7. 7.12² =
  8. 8.14² =
  9. 9.18² =
  10. 10.28² =
  11. 11.16² =
  12. 12.25² =
  13. 13.15² =
  14. 14.27² =
  15. 15.13² =
  16. 16.17² =
  17. 17.26² =
  18. 18.18² =
  19. 19.11² =
  20. 20.17² =
  21. 21.16² =
  22. 22.15² =
  23. 23.19² =
  24. 24.12² =
  25. 25.23² =
  26. 26.17² =
  27. 27.12² =
  28. 28.29² =
  29. 29.11² =
  30. 30.17² =
  31. 31.29² =
  32. 32.29² =
  33. 33.26² =
  34. 34.14² =
  35. 35.12² =
  36. 36.11² =
  37. 37.18² =
  38. 38.22² =
  39. 39.29² =
  40. 40.26² =

Answer key

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

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