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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 121 · 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. 1.21² =
  2. 2.26² =
  3. 3.27² =
  4. 4.19² =
  5. 5.15² =
  6. 6.14² =
  7. 7.25² =
  8. 8.12² =
  9. 9.22² =
  10. 10.28² =
  11. 11.11² =
  12. 12.13² =
  13. 13.17² =
  14. 14.29² =
  15. 15.29² =
  16. 16.18² =
  17. 17.16² =
  18. 18.24² =
  19. 19.16² =
  20. 20.27² =
  21. 21.23² =
  22. 22.19² =
  23. 23.29² =
  24. 24.12² =
  25. 25.15² =
  26. 26.12² =
  27. 27.21² =
  28. 28.17² =
  29. 29.21² =
  30. 30.21² =
  31. 31.26² =
  32. 32.13² =
  33. 33.13² =
  34. 34.26² =
  35. 35.13² =
  36. 36.19² =
  37. 37.11² =
  38. 38.25² =
  39. 39.25² =
  40. 40.22² =

Answer key

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

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