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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 501 · 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. 2.16² =
  3. 3.18² =
  4. 4.26² =
  5. 5.23² =
  6. 6.17² =
  7. 7.15² =
  8. 8.29² =
  9. 9.11² =
  10. 10.24² =
  11. 11.28² =
  12. 12.25² =
  13. 13.13² =
  14. 14.12² =
  15. 15.19² =
  16. 16.14² =
  17. 17.27² =
  18. 18.13² =
  19. 19.15² =
  20. 20.19² =
  21. 21.22² =
  22. 22.14² =
  23. 23.23² =
  24. 24.23² =
  25. 25.21² =
  26. 26.29² =
  27. 27.13² =
  28. 28.23² =
  29. 29.19² =
  30. 30.11² =
  31. 31.21² =
  32. 32.22² =
  33. 33.25² =
  34. 34.18² =
  35. 35.17² =
  36. 36.13² =
  37. 37.21² =
  38. 38.28² =
  39. 39.25² =
  40. 40.16² =

Answer key

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

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