← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 717 · 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. 1.13² =
  2. 2.16² =
  3. 3.17² =
  4. 4.19² =
  5. 5.11² =
  6. 6.21² =
  7. 7.26² =
  8. 8.28² =
  9. 9.22² =
  10. 10.24² =
  11. 11.23² =
  12. 12.27² =
  13. 13.12² =
  14. 14.25² =
  15. 15.14² =
  16. 16.15² =
  17. 17.18² =
  18. 18.13² =
  19. 19.29² =
  20. 20.23² =
  21. 21.23² =
  22. 22.17² =
  23. 23.21² =
  24. 24.29² =
  25. 25.27² =
  26. 26.26² =
  27. 27.16² =
  28. 28.22² =
  29. 29.18² =
  30. 30.25² =
  31. 31.27² =
  32. 32.15² =
  33. 33.18² =
  34. 34.27² =
  35. 35.12² =
  36. 36.19² =
  37. 37.14² =
  38. 38.21² =
  39. 39.17² =
  40. 40.22² =

Answer key

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

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