← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 332 · 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. 1.17² =
  2. 2.18² =
  3. 3.29² =
  4. 4.23² =
  5. 5.22² =
  6. 6.12² =
  7. 7.28² =
  8. 8.21² =
  9. 9.15² =
  10. 10.14² =
  11. 11.13² =
  12. 12.26² =
  13. 13.16² =
  14. 14.11² =
  15. 15.27² =
  16. 16.19² =
  17. 17.25² =
  18. 18.24² =
  19. 19.23² =
  20. 20.28² =
  21. 21.21² =
  22. 22.22² =
  23. 23.13² =
  24. 24.15² =
  25. 25.26² =
  26. 26.22² =
  27. 27.16² =
  28. 28.28² =
  29. 29.26² =
  30. 30.28² =
  31. 31.21² =
  32. 32.22² =
  33. 33.14² =
  34. 34.19² =
  35. 35.26² =
  36. 36.16² =
  37. 37.21² =
  38. 38.14² =
  39. 39.21² =
  40. 40.26² =

Answer key

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

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