← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 718 · 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. 1.15² =
  2. 2.21² =
  3. 3.18² =
  4. 4.23² =
  5. 5.19² =
  6. 6.26² =
  7. 7.12² =
  8. 8.24² =
  9. 9.29² =
  10. 10.17² =
  11. 11.25² =
  12. 12.22² =
  13. 13.28² =
  14. 14.13² =
  15. 15.27² =
  16. 16.16² =
  17. 17.19² =
  18. 18.11² =
  19. 19.22² =
  20. 20.14² =
  21. 21.21² =
  22. 22.14² =
  23. 23.29² =
  24. 24.17² =
  25. 25.16² =
  26. 26.21² =
  27. 27.21² =
  28. 28.15² =
  29. 29.27² =
  30. 30.21² =
  31. 31.19² =
  32. 32.14² =
  33. 33.26² =
  34. 34.29² =
  35. 35.14² =
  36. 36.16² =
  37. 37.24² =
  38. 38.19² =
  39. 39.28² =
  40. 40.25² =

Answer key

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

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