← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 934 · 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. 1.29² =
  2. 2.13² =
  3. 3.12² =
  4. 4.21² =
  5. 5.27² =
  6. 6.16² =
  7. 7.17² =
  8. 8.19² =
  9. 9.18² =
  10. 10.14² =
  11. 11.28² =
  12. 12.26² =
  13. 13.11² =
  14. 14.23² =
  15. 15.15² =
  16. 16.25² =
  17. 17.22² =
  18. 18.14² =
  19. 19.24² =
  20. 20.12² =
  21. 21.14² =
  22. 22.25² =
  23. 23.19² =
  24. 24.21² =
  25. 25.28² =
  26. 26.28² =
  27. 27.13² =
  28. 28.27² =
  29. 29.14² =
  30. 30.25² =
  31. 31.28² =
  32. 32.24² =
  33. 33.27² =
  34. 34.13² =
  35. 35.19² =
  36. 36.15² =
  37. 37.26² =
  38. 38.24² =
  39. 39.29² =
  40. 40.18² =

Answer key

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

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