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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 821 · 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. 1.13² =
  2. 2.24² =
  3. 3.15² =
  4. 4.11² =
  5. 5.28² =
  6. 6.21² =
  7. 7.25² =
  8. 8.29² =
  9. 9.12² =
  10. 10.23² =
  11. 11.19² =
  12. 12.22² =
  13. 13.18² =
  14. 14.14² =
  15. 15.27² =
  16. 16.16² =
  17. 17.26² =
  18. 18.17² =
  19. 19.11² =
  20. 20.16² =
  21. 21.21² =
  22. 22.13² =
  23. 23.22² =
  24. 24.29² =
  25. 25.12² =
  26. 26.15² =
  27. 27.11² =
  28. 28.22² =
  29. 29.23² =
  30. 30.19² =
  31. 31.22² =
  32. 32.21² =
  33. 33.15² =
  34. 34.21² =
  35. 35.21² =
  36. 36.13² =
  37. 37.15² =
  38. 38.11² =
  39. 39.15² =
  40. 40.18² =

Answer key

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

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