← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 387 · 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. 2.26² =
  3. 3.21² =
  4. 4.12² =
  5. 5.25² =
  6. 6.15² =
  7. 7.11² =
  8. 8.29² =
  9. 9.27² =
  10. 10.14² =
  11. 11.13² =
  12. 12.18² =
  13. 13.17² =
  14. 14.24² =
  15. 15.28² =
  16. 16.19² =
  17. 17.23² =
  18. 18.22² =
  19. 19.17² =
  20. 20.13² =
  21. 21.25² =
  22. 22.27² =
  23. 23.21² =
  24. 24.14² =
  25. 25.24² =
  26. 26.14² =
  27. 27.29² =
  28. 28.11² =
  29. 29.26² =
  30. 30.11² =
  31. 31.15² =
  32. 32.21² =
  33. 33.27² =
  34. 34.15² =
  35. 35.22² =
  36. 36.28² =
  37. 37.17² =
  38. 38.29² =
  39. 39.21² =
  40. 40.17² =

Answer key

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

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