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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 496 · 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. 1.18² =
  2. 2.16² =
  3. 3.14² =
  4. 4.26² =
  5. 5.21² =
  6. 6.19² =
  7. 7.13² =
  8. 8.25² =
  9. 9.29² =
  10. 10.12² =
  11. 11.28² =
  12. 12.15² =
  13. 13.27² =
  14. 14.22² =
  15. 15.14² =
  16. 16.23² =
  17. 17.11² =
  18. 18.24² =
  19. 19.17² =
  20. 20.22² =
  21. 21.15² =
  22. 22.11² =
  23. 23.14² =
  24. 24.15² =
  25. 25.12² =
  26. 26.21² =
  27. 27.15² =
  28. 28.12² =
  29. 29.29² =
  30. 30.15² =
  31. 31.17² =
  32. 32.23² =
  33. 33.17² =
  34. 34.17² =
  35. 35.11² =
  36. 36.15² =
  37. 37.26² =
  38. 38.29² =
  39. 39.18² =
  40. 40.11² =

Answer key

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

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