← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 53 · 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. 2.22² =
  3. 3.13² =
  4. 4.21² =
  5. 5.23² =
  6. 6.11² =
  7. 7.16² =
  8. 8.27² =
  9. 9.25² =
  10. 10.28² =
  11. 11.29² =
  12. 12.12² =
  13. 13.19² =
  14. 14.26² =
  15. 15.17² =
  16. 16.23² =
  17. 17.15² =
  18. 18.18² =
  19. 19.28² =
  20. 20.24² =
  21. 21.17² =
  22. 22.15² =
  23. 23.21² =
  24. 24.18² =
  25. 25.19² =
  26. 26.21² =
  27. 27.28² =
  28. 28.23² =
  29. 29.24² =
  30. 30.27² =
  31. 31.26² =
  32. 32.28² =
  33. 33.12² =
  34. 34.26² =
  35. 35.21² =
  36. 36.13² =
  37. 37.15² =
  38. 38.25² =
  39. 39.29² =
  40. 40.28² =

Answer key

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

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