← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 425 · 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. 1.22² =
  2. 2.29² =
  3. 3.19² =
  4. 4.13² =
  5. 5.28² =
  6. 6.27² =
  7. 7.26² =
  8. 8.12² =
  9. 9.18² =
  10. 10.25² =
  11. 11.17² =
  12. 12.24² =
  13. 13.21² =
  14. 14.11² =
  15. 15.15² =
  16. 16.23² =
  17. 17.14² =
  18. 18.11² =
  19. 19.14² =
  20. 20.12² =
  21. 21.11² =
  22. 22.21² =
  23. 23.11² =
  24. 24.12² =
  25. 25.16² =
  26. 26.17² =
  27. 27.25² =
  28. 28.11² =
  29. 29.12² =
  30. 30.11² =
  31. 31.21² =
  32. 32.15² =
  33. 33.11² =
  34. 34.26² =
  35. 35.22² =
  36. 36.19² =
  37. 37.25² =
  38. 38.13² =
  39. 39.15² =
  40. 40.25² =

Answer key

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

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