← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 963 · 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. 1.12² =
  2. 2.26² =
  3. 3.24² =
  4. 4.14² =
  5. 5.22² =
  6. 6.11² =
  7. 7.17² =
  8. 8.27² =
  9. 9.21² =
  10. 10.13² =
  11. 11.15² =
  12. 12.28² =
  13. 13.23² =
  14. 14.19² =
  15. 15.25² =
  16. 16.29² =
  17. 17.16² =
  18. 18.26² =
  19. 19.19² =
  20. 20.15² =
  21. 21.17² =
  22. 22.28² =
  23. 23.18² =
  24. 24.26² =
  25. 25.22² =
  26. 26.26² =
  27. 27.23² =
  28. 28.15² =
  29. 29.16² =
  30. 30.22² =
  31. 31.15² =
  32. 32.23² =
  33. 33.14² =
  34. 34.14² =
  35. 35.26² =
  36. 36.16² =
  37. 37.16² =
  38. 38.17² =
  39. 39.26² =
  40. 40.17² =

Answer key

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

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