← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 756 · 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. 1.19² =
  2. 2.17² =
  3. 3.16² =
  4. 4.29² =
  5. 5.21² =
  6. 6.24² =
  7. 7.26² =
  8. 8.23² =
  9. 9.15² =
  10. 10.18² =
  11. 11.13² =
  12. 12.27² =
  13. 13.25² =
  14. 14.18² =
  15. 15.14² =
  16. 16.11² =
  17. 17.28² =
  18. 18.18² =
  19. 19.22² =
  20. 20.12² =
  21. 21.21² =
  22. 22.26² =
  23. 23.12² =
  24. 24.25² =
  25. 25.12² =
  26. 26.21² =
  27. 27.21² =
  28. 28.21² =
  29. 29.26² =
  30. 30.21² =
  31. 31.28² =
  32. 32.18² =
  33. 33.21² =
  34. 34.26² =
  35. 35.12² =
  36. 36.29² =
  37. 37.23² =
  38. 38.15² =
  39. 39.12² =
  40. 40.18² =

Answer key

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

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths