← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 503 · 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. 1.26² =
  2. 2.12² =
  3. 3.17² =
  4. 4.28² =
  5. 5.15² =
  6. 6.18² =
  7. 7.16² =
  8. 8.22² =
  9. 9.19² =
  10. 10.11² =
  11. 11.13² =
  12. 12.21² =
  13. 13.24² =
  14. 14.14² =
  15. 15.13² =
  16. 16.27² =
  17. 17.25² =
  18. 18.23² =
  19. 19.21² =
  20. 20.29² =
  21. 21.13² =
  22. 22.29² =
  23. 23.29² =
  24. 24.22² =
  25. 25.26² =
  26. 26.12² =
  27. 27.13² =
  28. 28.21² =
  29. 29.13² =
  30. 30.18² =
  31. 31.21² =
  32. 32.23² =
  33. 33.25² =
  34. 34.21² =
  35. 35.22² =
  36. 36.18² =
  37. 37.11² =
  38. 38.23² =
  39. 39.15² =
  40. 40.13² =

Answer key

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

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