← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 588 · 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. 1.27² =
  2. 2.15² =
  3. 3.23² =
  4. 4.13² =
  5. 5.17² =
  6. 6.29² =
  7. 7.12² =
  8. 8.16² =
  9. 9.26² =
  10. 10.28² =
  11. 11.11² =
  12. 12.24² =
  13. 13.22² =
  14. 14.21² =
  15. 15.14² =
  16. 16.18² =
  17. 17.19² =
  18. 18.25² =
  19. 19.21² =
  20. 20.25² =
  21. 21.11² =
  22. 22.23² =
  23. 23.28² =
  24. 24.18² =
  25. 25.15² =
  26. 26.19² =
  27. 27.24² =
  28. 28.12² =
  29. 29.21² =
  30. 30.17² =
  31. 31.28² =
  32. 32.23² =
  33. 33.28² =
  34. 34.15² =
  35. 35.21² =
  36. 36.24² =
  37. 37.19² =
  38. 38.25² =
  39. 39.27² =
  40. 40.14² =

Answer key

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

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