← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 766 · 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. 1.18² =
  2. 2.15² =
  3. 3.21² =
  4. 4.16² =
  5. 5.19² =
  6. 6.11² =
  7. 7.27² =
  8. 8.12² =
  9. 9.14² =
  10. 10.28² =
  11. 11.29² =
  12. 12.22² =
  13. 13.13² =
  14. 14.25² =
  15. 15.23² =
  16. 16.17² =
  17. 17.26² =
  18. 18.13² =
  19. 19.15² =
  20. 20.24² =
  21. 21.14² =
  22. 22.28² =
  23. 23.27² =
  24. 24.14² =
  25. 25.25² =
  26. 26.13² =
  27. 27.13² =
  28. 28.26² =
  29. 29.29² =
  30. 30.11² =
  31. 31.26² =
  32. 32.21² =
  33. 33.15² =
  34. 34.12² =
  35. 35.16² =
  36. 36.25² =
  37. 37.19² =
  38. 38.23² =
  39. 39.22² =
  40. 40.24² =

Answer key

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

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