← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 322 · 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. 1.14² =
  2. 2.18² =
  3. 3.11² =
  4. 4.21² =
  5. 5.28² =
  6. 6.26² =
  7. 7.12² =
  8. 8.22² =
  9. 9.17² =
  10. 10.24² =
  11. 11.27² =
  12. 12.29² =
  13. 13.16² =
  14. 14.19² =
  15. 15.15² =
  16. 16.13² =
  17. 17.21² =
  18. 18.12² =
  19. 19.25² =
  20. 20.23² =
  21. 21.26² =
  22. 22.11² =
  23. 23.17² =
  24. 24.13² =
  25. 25.17² =
  26. 26.21² =
  27. 27.16² =
  28. 28.13² =
  29. 29.24² =
  30. 30.21² =
  31. 31.13² =
  32. 32.29² =
  33. 33.18² =
  34. 34.22² =
  35. 35.24² =
  36. 36.22² =
  37. 37.21² =
  38. 38.16² =
  39. 39.15² =
  40. 40.24² =

Answer key

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

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