← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 925 · 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. 2.22² =
  3. 3.15² =
  4. 4.26² =
  5. 5.18² =
  6. 6.21² =
  7. 7.27² =
  8. 8.23² =
  9. 9.16² =
  10. 10.14² =
  11. 11.25² =
  12. 12.11² =
  13. 13.28² =
  14. 14.13² =
  15. 15.17² =
  16. 16.14² =
  17. 17.12² =
  18. 18.29² =
  19. 19.28² =
  20. 20.25² =
  21. 21.21² =
  22. 22.24² =
  23. 23.16² =
  24. 24.21² =
  25. 25.15² =
  26. 26.19² =
  27. 27.27² =
  28. 28.23² =
  29. 29.25² =
  30. 30.17² =
  31. 31.14² =
  32. 32.25² =
  33. 33.25² =
  34. 34.11² =
  35. 35.17² =
  36. 36.15² =
  37. 37.15² =
  38. 38.12² =
  39. 39.21² =
  40. 40.22² =

Answer key

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

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