← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 703 · 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. 1.16² =
  2. 2.24² =
  3. 3.11² =
  4. 4.21² =
  5. 5.27² =
  6. 6.18² =
  7. 7.28² =
  8. 8.13² =
  9. 9.26² =
  10. 10.14² =
  11. 11.15² =
  12. 12.12² =
  13. 13.19² =
  14. 14.23² =
  15. 15.25² =
  16. 16.22² =
  17. 17.17² =
  18. 18.29² =
  19. 19.11² =
  20. 20.21² =
  21. 21.25² =
  22. 22.29² =
  23. 23.13² =
  24. 24.26² =
  25. 25.28² =
  26. 26.12² =
  27. 27.15² =
  28. 28.24² =
  29. 29.13² =
  30. 30.17² =
  31. 31.11² =
  32. 32.18² =
  33. 33.15² =
  34. 34.28² =
  35. 35.18² =
  36. 36.13² =
  37. 37.27² =
  38. 38.13² =
  39. 39.21² =
  40. 40.16² =

Answer key

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

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