← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 805 · 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. 2.15² =
  3. 3.24² =
  4. 4.23² =
  5. 5.19² =
  6. 6.12² =
  7. 7.13² =
  8. 8.18² =
  9. 9.17² =
  10. 10.21² =
  11. 11.14² =
  12. 12.11² =
  13. 13.28² =
  14. 14.22² =
  15. 15.27² =
  16. 16.26² =
  17. 17.11² =
  18. 18.25² =
  19. 19.16² =
  20. 20.14² =
  21. 21.29² =
  22. 22.14² =
  23. 23.15² =
  24. 24.21² =
  25. 25.22² =
  26. 26.25² =
  27. 27.24² =
  28. 28.14² =
  29. 29.11² =
  30. 30.17² =
  31. 31.19² =
  32. 32.23² =
  33. 33.15² =
  34. 34.28² =
  35. 35.29² =
  36. 36.13² =
  37. 37.18² =
  38. 38.16² =
  39. 39.26² =
  40. 40.23² =

Answer key

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

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