← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 605 · 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. 2.25² =
  3. 3.19² =
  4. 4.28² =
  5. 5.24² =
  6. 6.12² =
  7. 7.16² =
  8. 8.22² =
  9. 9.17² =
  10. 10.14² =
  11. 11.13² =
  12. 12.11² =
  13. 13.27² =
  14. 14.23² =
  15. 15.15² =
  16. 16.29² =
  17. 17.18² =
  18. 18.23² =
  19. 19.26² =
  20. 20.27² =
  21. 21.17² =
  22. 22.14² =
  23. 23.25² =
  24. 24.18² =
  25. 25.26² =
  26. 26.12² =
  27. 27.18² =
  28. 28.19² =
  29. 29.21² =
  30. 30.14² =
  31. 31.24² =
  32. 32.29² =
  33. 33.11² =
  34. 34.18² =
  35. 35.12² =
  36. 36.14² =
  37. 37.24² =
  38. 38.16² =
  39. 39.21² =
  40. 40.14² =

Answer key

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

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