← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 920 · 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. 1.21² =
  2. 2.24² =
  3. 3.12² =
  4. 4.19² =
  5. 5.11² =
  6. 6.27² =
  7. 7.13² =
  8. 8.29² =
  9. 9.22² =
  10. 10.16² =
  11. 11.18² =
  12. 12.25² =
  13. 13.26² =
  14. 14.23² =
  15. 15.17² =
  16. 16.14² =
  17. 17.28² =
  18. 18.26² =
  19. 19.15² =
  20. 20.17² =
  21. 21.23² =
  22. 22.21² =
  23. 23.21² =
  24. 24.23² =
  25. 25.28² =
  26. 26.19² =
  27. 27.14² =
  28. 28.28² =
  29. 29.15² =
  30. 30.26² =
  31. 31.17² =
  32. 32.12² =
  33. 33.13² =
  34. 34.26² =
  35. 35.29² =
  36. 36.24² =
  37. 37.28² =
  38. 38.29² =
  39. 39.23² =
  40. 40.15² =

Answer key

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

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