← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 838 · 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. 1.29² =
  2. 2.12² =
  3. 3.16² =
  4. 4.27² =
  5. 5.14² =
  6. 6.17² =
  7. 7.28² =
  8. 8.11² =
  9. 9.21² =
  10. 10.15² =
  11. 11.25² =
  12. 12.22² =
  13. 13.23² =
  14. 14.13² =
  15. 15.26² =
  16. 16.19² =
  17. 17.26² =
  18. 18.15² =
  19. 19.24² =
  20. 20.28² =
  21. 21.11² =
  22. 22.18² =
  23. 23.15² =
  24. 24.16² =
  25. 25.16² =
  26. 26.19² =
  27. 27.12² =
  28. 28.12² =
  29. 29.18² =
  30. 30.29² =
  31. 31.14² =
  32. 32.23² =
  33. 33.26² =
  34. 34.14² =
  35. 35.21² =
  36. 36.26² =
  37. 37.17² =
  38. 38.23² =
  39. 39.18² =
  40. 40.23² =

Answer key

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

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