← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 558 · 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. 1.13² =
  2. 2.12² =
  3. 3.26² =
  4. 4.23² =
  5. 5.18² =
  6. 6.15² =
  7. 7.25² =
  8. 8.21² =
  9. 9.24² =
  10. 10.28² =
  11. 11.17² =
  12. 12.16² =
  13. 13.19² =
  14. 14.14² =
  15. 15.27² =
  16. 16.29² =
  17. 17.22² =
  18. 18.21² =
  19. 19.11² =
  20. 20.13² =
  21. 21.23² =
  22. 22.21² =
  23. 23.21² =
  24. 24.16² =
  25. 25.18² =
  26. 26.29² =
  27. 27.13² =
  28. 28.26² =
  29. 29.15² =
  30. 30.14² =
  31. 31.11² =
  32. 32.21² =
  33. 33.28² =
  34. 34.19² =
  35. 35.15² =
  36. 36.18² =
  37. 37.28² =
  38. 38.26² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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