← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 255 · 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. 1.18² =
  2. 2.25² =
  3. 3.14² =
  4. 4.15² =
  5. 5.11² =
  6. 6.23² =
  7. 7.24² =
  8. 8.13² =
  9. 9.21² =
  10. 10.16² =
  11. 11.19² =
  12. 12.27² =
  13. 13.28² =
  14. 14.17² =
  15. 15.12² =
  16. 16.29² =
  17. 17.22² =
  18. 18.26² =
  19. 19.14² =
  20. 20.22² =
  21. 21.29² =
  22. 22.25² =
  23. 23.12² =
  24. 24.13² =
  25. 25.21² =
  26. 26.25² =
  27. 27.11² =
  28. 28.27² =
  29. 29.13² =
  30. 30.21² =
  31. 31.21² =
  32. 32.21² =
  33. 33.18² =
  34. 34.14² =
  35. 35.14² =
  36. 36.22² =
  37. 37.22² =
  38. 38.15² =
  39. 39.22² =
  40. 40.12² =

Answer key

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

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