← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 315 · 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. 1.16² =
  2. 2.15² =
  3. 3.19² =
  4. 4.27² =
  5. 5.26² =
  6. 6.21² =
  7. 7.12² =
  8. 8.14² =
  9. 9.22² =
  10. 10.11² =
  11. 11.25² =
  12. 12.18² =
  13. 13.24² =
  14. 14.23² =
  15. 15.17² =
  16. 16.28² =
  17. 17.13² =
  18. 18.17² =
  19. 19.29² =
  20. 20.19² =
  21. 21.19² =
  22. 22.17² =
  23. 23.21² =
  24. 24.11² =
  25. 25.22² =
  26. 26.22² =
  27. 27.29² =
  28. 28.12² =
  29. 29.11² =
  30. 30.18² =
  31. 31.28² =
  32. 32.14² =
  33. 33.17² =
  34. 34.15² =
  35. 35.19² =
  36. 36.22² =
  37. 37.28² =
  38. 38.24² =
  39. 39.21² =
  40. 40.14² =

Answer key

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

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