← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 100 · 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. 1.24² =
  2. 2.25² =
  3. 3.15² =
  4. 4.21² =
  5. 5.14² =
  6. 6.23² =
  7. 7.17² =
  8. 8.26² =
  9. 9.13² =
  10. 10.11² =
  11. 11.27² =
  12. 12.18² =
  13. 13.22² =
  14. 14.16² =
  15. 15.29² =
  16. 16.13² =
  17. 17.12² =
  18. 18.19² =
  19. 19.19² =
  20. 20.23² =
  21. 21.17² =
  22. 22.11² =
  23. 23.14² =
  24. 24.26² =
  25. 25.28² =
  26. 26.12² =
  27. 27.24² =
  28. 28.24² =
  29. 29.15² =
  30. 30.25² =
  31. 31.14² =
  32. 32.27² =
  33. 33.12² =
  34. 34.25² =
  35. 35.19² =
  36. 36.13² =
  37. 37.25² =
  38. 38.21² =
  39. 39.19² =
  40. 40.14² =

Answer key

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

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