← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 318 · 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. 1.22² =
  2. 2.29² =
  3. 3.11² =
  4. 4.27² =
  5. 5.28² =
  6. 6.14² =
  7. 7.19² =
  8. 8.21² =
  9. 9.15² =
  10. 10.12² =
  11. 11.24² =
  12. 12.13² =
  13. 13.16² =
  14. 14.18² =
  15. 15.11² =
  16. 16.26² =
  17. 17.23² =
  18. 18.25² =
  19. 19.28² =
  20. 20.12² =
  21. 21.29² =
  22. 22.28² =
  23. 23.18² =
  24. 24.14² =
  25. 25.12² =
  26. 26.14² =
  27. 27.15² =
  28. 28.21² =
  29. 29.22² =
  30. 30.17² =
  31. 31.13² =
  32. 32.19² =
  33. 33.11² =
  34. 34.17² =
  35. 35.25² =
  36. 36.24² =
  37. 37.12² =
  38. 38.27² =
  39. 39.14² =
  40. 40.23² =

Answer key

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

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