← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 365 · 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. 2.25² =
  3. 3.12² =
  4. 4.11² =
  5. 5.13² =
  6. 6.16² =
  7. 7.28² =
  8. 8.14² =
  9. 9.22² =
  10. 10.15² =
  11. 11.21² =
  12. 12.19² =
  13. 13.23² =
  14. 14.18² =
  15. 15.26² =
  16. 16.27² =
  17. 17.17² =
  18. 18.21² =
  19. 19.21² =
  20. 20.24² =
  21. 21.14² =
  22. 22.16² =
  23. 23.13² =
  24. 24.21² =
  25. 25.25² =
  26. 26.29² =
  27. 27.14² =
  28. 28.11² =
  29. 29.13² =
  30. 30.17² =
  31. 31.15² =
  32. 32.22² =
  33. 33.19² =
  34. 34.15² =
  35. 35.24² =
  36. 36.21² =
  37. 37.13² =
  38. 38.14² =
  39. 39.11² =
  40. 40.16² =

Answer key

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

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