← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 549 · 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. 1.24² =
  2. 2.17² =
  3. 3.14² =
  4. 4.27² =
  5. 5.25² =
  6. 6.26² =
  7. 7.22² =
  8. 8.28² =
  9. 9.19² =
  10. 10.16² =
  11. 11.11² =
  12. 12.23² =
  13. 13.21² =
  14. 14.13² =
  15. 15.18² =
  16. 16.12² =
  17. 17.15² =
  18. 18.29² =
  19. 19.15² =
  20. 20.28² =
  21. 21.28² =
  22. 22.18² =
  23. 23.17² =
  24. 24.21² =
  25. 25.17² =
  26. 26.15² =
  27. 27.18² =
  28. 28.28² =
  29. 29.11² =
  30. 30.15² =
  31. 31.23² =
  32. 32.29² =
  33. 33.25² =
  34. 34.25² =
  35. 35.21² =
  36. 36.25² =
  37. 37.23² =
  38. 38.16² =
  39. 39.15² =
  40. 40.23² =

Answer key

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

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