← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 198 · 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. 1.11² =
  2. 2.27² =
  3. 3.22² =
  4. 4.19² =
  5. 5.13² =
  6. 6.23² =
  7. 7.21² =
  8. 8.16² =
  9. 9.25² =
  10. 10.24² =
  11. 11.17² =
  12. 12.18² =
  13. 13.29² =
  14. 14.12² =
  15. 15.26² =
  16. 16.15² =
  17. 17.14² =
  18. 18.29² =
  19. 19.24² =
  20. 20.28² =
  21. 21.21² =
  22. 22.24² =
  23. 23.11² =
  24. 24.17² =
  25. 25.27² =
  26. 26.26² =
  27. 27.11² =
  28. 28.25² =
  29. 29.27² =
  30. 30.26² =
  31. 31.13² =
  32. 32.28² =
  33. 33.23² =
  34. 34.15² =
  35. 35.27² =
  36. 36.15² =
  37. 37.28² =
  38. 38.19² =
  39. 39.15² =
  40. 40.13² =

Answer key

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

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