← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 713 · 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. 1.28² =
  2. 2.18² =
  3. 3.17² =
  4. 4.22² =
  5. 5.21² =
  6. 6.29² =
  7. 7.16² =
  8. 8.13² =
  9. 9.11² =
  10. 10.25² =
  11. 11.14² =
  12. 12.12² =
  13. 13.24² =
  14. 14.15² =
  15. 15.26² =
  16. 16.23² =
  17. 17.27² =
  18. 18.21² =
  19. 19.19² =
  20. 20.26² =
  21. 21.12² =
  22. 22.23² =
  23. 23.17² =
  24. 24.12² =
  25. 25.14² =
  26. 26.29² =
  27. 27.12² =
  28. 28.28² =
  29. 29.29² =
  30. 30.17² =
  31. 31.15² =
  32. 32.17² =
  33. 33.28² =
  34. 34.22² =
  35. 35.13² =
  36. 36.27² =
  37. 37.23² =
  38. 38.21² =
  39. 39.19² =
  40. 40.25² =

Answer key

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

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