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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 809 · 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. 1.23² =
  2. 2.14² =
  3. 3.16² =
  4. 4.18² =
  5. 5.21² =
  6. 6.27² =
  7. 7.13² =
  8. 8.19² =
  9. 9.25² =
  10. 10.12² =
  11. 11.15² =
  12. 12.28² =
  13. 13.17² =
  14. 14.11² =
  15. 15.29² =
  16. 16.22² =
  17. 17.24² =
  18. 18.28² =
  19. 19.27² =
  20. 20.11² =
  21. 21.26² =
  22. 22.26² =
  23. 23.18² =
  24. 24.28² =
  25. 25.15² =
  26. 26.17² =
  27. 27.21² =
  28. 28.18² =
  29. 29.23² =
  30. 30.27² =
  31. 31.25² =
  32. 32.28² =
  33. 33.27² =
  34. 34.19² =
  35. 35.15² =
  36. 36.15² =
  37. 37.27² =
  38. 38.18² =
  39. 39.24² =
  40. 40.22² =

Answer key

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

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