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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 250 · 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. 1.27² =
  2. 2.11² =
  3. 3.18² =
  4. 4.17² =
  5. 5.15² =
  6. 6.16² =
  7. 7.24² =
  8. 8.22² =
  9. 9.28² =
  10. 10.29² =
  11. 11.23² =
  12. 12.12² =
  13. 13.21² =
  14. 14.13² =
  15. 15.14² =
  16. 16.19² =
  17. 17.26² =
  18. 18.25² =
  19. 19.23² =
  20. 20.21² =
  21. 21.13² =
  22. 22.15² =
  23. 23.18² =
  24. 24.19² =
  25. 25.24² =
  26. 26.14² =
  27. 27.23² =
  28. 28.19² =
  29. 29.24² =
  30. 30.21² =
  31. 31.14² =
  32. 32.19² =
  33. 33.13² =
  34. 34.25² =
  35. 35.17² =
  36. 36.21² =
  37. 37.16² =
  38. 38.15² =
  39. 39.15² =
  40. 40.16² =

Answer key

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

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