← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 966 · 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. 2.12² =
  3. 3.22² =
  4. 4.14² =
  5. 5.23² =
  6. 6.11² =
  7. 7.15² =
  8. 8.13² =
  9. 9.27² =
  10. 10.21² =
  11. 11.16² =
  12. 12.28² =
  13. 13.19² =
  14. 14.29² =
  15. 15.17² =
  16. 16.26² =
  17. 17.13² =
  18. 18.18² =
  19. 19.24² =
  20. 20.17² =
  21. 21.21² =
  22. 22.13² =
  23. 23.19² =
  24. 24.16² =
  25. 25.27² =
  26. 26.18² =
  27. 27.19² =
  28. 28.28² =
  29. 29.22² =
  30. 30.18² =
  31. 31.29² =
  32. 32.27² =
  33. 33.21² =
  34. 34.18² =
  35. 35.15² =
  36. 36.29² =
  37. 37.26² =
  38. 38.21² =
  39. 39.14² =
  40. 40.14² =

Answer key

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

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