← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 916 · 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. 3.27² =
  4. 4.18² =
  5. 5.23² =
  6. 6.21² =
  7. 7.19² =
  8. 8.26² =
  9. 9.15² =
  10. 10.16² =
  11. 11.13² =
  12. 12.14² =
  13. 13.22² =
  14. 14.12² =
  15. 15.16² =
  16. 16.29² =
  17. 17.28² =
  18. 18.11² =
  19. 19.13² =
  20. 20.17² =
  21. 21.27² =
  22. 22.28² =
  23. 23.19² =
  24. 24.16² =
  25. 25.21² =
  26. 26.24² =
  27. 27.19² =
  28. 28.15² =
  29. 29.21² =
  30. 30.13² =
  31. 31.21² =
  32. 32.15² =
  33. 33.11² =
  34. 34.14² =
  35. 35.13² =
  36. 36.15² =
  37. 37.28² =
  38. 38.11² =
  39. 39.16² =
  40. 40.12² =

Answer key

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

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