← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 824 · 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. 1.23² =
  2. 2.25² =
  3. 3.13² =
  4. 4.17² =
  5. 5.21² =
  6. 6.12² =
  7. 7.15² =
  8. 8.16² =
  9. 9.28² =
  10. 10.24² =
  11. 11.19² =
  12. 12.14² =
  13. 13.11² =
  14. 14.18² =
  15. 15.15² =
  16. 16.25² =
  17. 17.29² =
  18. 18.26² =
  19. 19.27² =
  20. 20.22² =
  21. 21.24² =
  22. 22.19² =
  23. 23.19² =
  24. 24.16² =
  25. 25.13² =
  26. 26.23² =
  27. 27.13² =
  28. 28.19² =
  29. 29.21² =
  30. 30.12² =
  31. 31.13² =
  32. 32.23² =
  33. 33.21² =
  34. 34.23² =
  35. 35.28² =
  36. 36.19² =
  37. 37.11² =
  38. 38.13² =
  39. 39.19² =
  40. 40.16² =

Answer key

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

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