← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 232 · 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. 1.23² =
  2. 2.25² =
  3. 3.27² =
  4. 4.26² =
  5. 5.29² =
  6. 6.12² =
  7. 7.22² =
  8. 8.11² =
  9. 9.24² =
  10. 10.15² =
  11. 11.16² =
  12. 12.18² =
  13. 13.28² =
  14. 14.19² =
  15. 15.21² =
  16. 16.13² =
  17. 17.19² =
  18. 18.14² =
  19. 19.25² =
  20. 20.29² =
  21. 21.17² =
  22. 22.27² =
  23. 23.21² =
  24. 24.11² =
  25. 25.15² =
  26. 26.22² =
  27. 27.17² =
  28. 28.15² =
  29. 29.21² =
  30. 30.22² =
  31. 31.27² =
  32. 32.16² =
  33. 33.21² =
  34. 34.21² =
  35. 35.25² =
  36. 36.14² =
  37. 37.22² =
  38. 38.17² =
  39. 39.16² =
  40. 40.11² =

Answer key

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

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