← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 845 · 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. 2.11² =
  3. 3.14² =
  4. 4.17² =
  5. 5.22² =
  6. 6.23² =
  7. 7.13² =
  8. 8.15² =
  9. 9.19² =
  10. 10.21² =
  11. 11.28² =
  12. 12.26² =
  13. 13.24² =
  14. 14.25² =
  15. 15.18² =
  16. 16.23² =
  17. 17.29² =
  18. 18.12² =
  19. 19.16² =
  20. 20.13² =
  21. 21.24² =
  22. 22.18² =
  23. 23.11² =
  24. 24.28² =
  25. 25.21² =
  26. 26.29² =
  27. 27.29² =
  28. 28.28² =
  29. 29.15² =
  30. 30.22² =
  31. 31.26² =
  32. 32.29² =
  33. 33.11² =
  34. 34.14² =
  35. 35.17² =
  36. 36.16² =
  37. 37.14² =
  38. 38.23² =
  39. 39.25² =
  40. 40.28² =

Answer key

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

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