← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 961 · 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. 1.12² =
  2. 2.11² =
  3. 3.18² =
  4. 4.29² =
  5. 5.27² =
  6. 6.21² =
  7. 7.24² =
  8. 8.23² =
  9. 9.19² =
  10. 10.17² =
  11. 11.25² =
  12. 12.28² =
  13. 13.22² =
  14. 14.13² =
  15. 15.15² =
  16. 16.14² =
  17. 17.22² =
  18. 18.26² =
  19. 19.16² =
  20. 20.11² =
  21. 21.12² =
  22. 22.13² =
  23. 23.15² =
  24. 24.11² =
  25. 25.14² =
  26. 26.28² =
  27. 27.13² =
  28. 28.21² =
  29. 29.11² =
  30. 30.11² =
  31. 31.29² =
  32. 32.11² =
  33. 33.13² =
  34. 34.24² =
  35. 35.28² =
  36. 36.29² =
  37. 37.11² =
  38. 38.28² =
  39. 39.15² =
  40. 40.22² =

Answer key

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

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