← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 388 · 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. 1.16² =
  2. 2.19² =
  3. 3.26² =
  4. 4.22² =
  5. 5.21² =
  6. 6.15² =
  7. 7.24² =
  8. 8.18² =
  9. 9.29² =
  10. 10.28² =
  11. 11.25² =
  12. 12.27² =
  13. 13.12² =
  14. 14.13² =
  15. 15.23² =
  16. 16.11² =
  17. 17.14² =
  18. 18.17² =
  19. 19.21² =
  20. 20.17² =
  21. 21.21² =
  22. 22.12² =
  23. 23.14² =
  24. 24.23² =
  25. 25.29² =
  26. 26.16² =
  27. 27.13² =
  28. 28.21² =
  29. 29.29² =
  30. 30.14² =
  31. 31.17² =
  32. 32.18² =
  33. 33.12² =
  34. 34.21² =
  35. 35.15² =
  36. 36.13² =
  37. 37.27² =
  38. 38.17² =
  39. 39.15² =
  40. 40.12² =

Answer key

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

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