← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 935 · 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. 1.17² =
  2. 2.26² =
  3. 3.27² =
  4. 4.13² =
  5. 5.16² =
  6. 6.22² =
  7. 7.29² =
  8. 8.15² =
  9. 9.21² =
  10. 10.11² =
  11. 11.18² =
  12. 12.28² =
  13. 13.23² =
  14. 14.14² =
  15. 15.24² =
  16. 16.12² =
  17. 17.25² =
  18. 18.24² =
  19. 19.19² =
  20. 20.18² =
  21. 21.24² =
  22. 22.23² =
  23. 23.11² =
  24. 24.13² =
  25. 25.17² =
  26. 26.15² =
  27. 27.27² =
  28. 28.29² =
  29. 29.17² =
  30. 30.28² =
  31. 31.28² =
  32. 32.15² =
  33. 33.21² =
  34. 34.22² =
  35. 35.15² =
  36. 36.22² =
  37. 37.21² =
  38. 38.28² =
  39. 39.25² =
  40. 40.11² =

Answer key

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

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