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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 335 · 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. 1.22² =
  2. 2.29² =
  3. 3.24² =
  4. 4.17² =
  5. 5.16² =
  6. 6.26² =
  7. 7.13² =
  8. 8.25² =
  9. 9.21² =
  10. 10.27² =
  11. 11.14² =
  12. 12.28² =
  13. 13.23² =
  14. 14.15² =
  15. 15.18² =
  16. 16.12² =
  17. 17.21² =
  18. 18.11² =
  19. 19.19² =
  20. 20.15² =
  21. 21.18² =
  22. 22.25² =
  23. 23.18² =
  24. 24.28² =
  25. 25.21² =
  26. 26.17² =
  27. 27.12² =
  28. 28.28² =
  29. 29.24² =
  30. 30.21² =
  31. 31.18² =
  32. 32.23² =
  33. 33.21² =
  34. 34.18² =
  35. 35.25² =
  36. 36.13² =
  37. 37.21² =
  38. 38.29² =
  39. 39.21² =
  40. 40.16² =

Answer key

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

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