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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 475 · 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. 1.19² =
  2. 2.23² =
  3. 3.25² =
  4. 4.18² =
  5. 5.22² =
  6. 6.21² =
  7. 7.12² =
  8. 8.14² =
  9. 9.16² =
  10. 10.13² =
  11. 11.28² =
  12. 12.11² =
  13. 13.15² =
  14. 14.27² =
  15. 15.17² =
  16. 16.24² =
  17. 17.11² =
  18. 18.29² =
  19. 19.26² =
  20. 20.25² =
  21. 21.13² =
  22. 22.25² =
  23. 23.14² =
  24. 24.21² =
  25. 25.16² =
  26. 26.16² =
  27. 27.13² =
  28. 28.15² =
  29. 29.13² =
  30. 30.14² =
  31. 31.13² =
  32. 32.16² =
  33. 33.29² =
  34. 34.21² =
  35. 35.21² =
  36. 36.13² =
  37. 37.19² =
  38. 38.18² =
  39. 39.21² =
  40. 40.18² =

Answer key

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

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