← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 164 · 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. 1.25² =
  2. 2.21² =
  3. 3.18² =
  4. 4.28² =
  5. 5.23² =
  6. 6.12² =
  7. 7.14² =
  8. 8.19² =
  9. 9.13² =
  10. 10.17² =
  11. 11.24² =
  12. 12.26² =
  13. 13.27² =
  14. 14.29² =
  15. 15.23² =
  16. 16.15² =
  17. 17.11² =
  18. 18.19² =
  19. 19.16² =
  20. 20.22² =
  21. 21.25² =
  22. 22.17² =
  23. 23.16² =
  24. 24.13² =
  25. 25.23² =
  26. 26.14² =
  27. 27.18² =
  28. 28.21² =
  29. 29.24² =
  30. 30.24² =
  31. 31.18² =
  32. 32.15² =
  33. 33.26² =
  34. 34.17² =
  35. 35.25² =
  36. 36.17² =
  37. 37.21² =
  38. 38.15² =
  39. 39.24² =
  40. 40.25² =

Answer key

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

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