← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 670 · 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. 1.14² =
  2. 2.25² =
  3. 3.12² =
  4. 4.23² =
  5. 5.19² =
  6. 6.17² =
  7. 7.28² =
  8. 8.15² =
  9. 9.21² =
  10. 10.13² =
  11. 11.11² =
  12. 12.29² =
  13. 13.24² =
  14. 14.16² =
  15. 15.18² =
  16. 16.27² =
  17. 17.26² =
  18. 18.11² =
  19. 19.15² =
  20. 20.13² =
  21. 21.22² =
  22. 22.26² =
  23. 23.14² =
  24. 24.16² =
  25. 25.21² =
  26. 26.12² =
  27. 27.26² =
  28. 28.28² =
  29. 29.11² =
  30. 30.28² =
  31. 31.16² =
  32. 32.13² =
  33. 33.26² =
  34. 34.27² =
  35. 35.25² =
  36. 36.21² =
  37. 37.11² =
  38. 38.28² =
  39. 39.15² =
  40. 40.29² =

Answer key

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

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