← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 525 · 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. 1.27² =
  2. 2.28² =
  3. 3.23² =
  4. 4.15² =
  5. 5.18² =
  6. 6.29² =
  7. 7.14² =
  8. 8.19² =
  9. 9.25² =
  10. 10.26² =
  11. 11.12² =
  12. 12.17² =
  13. 13.11² =
  14. 14.21² =
  15. 15.13² =
  16. 16.16² =
  17. 17.24² =
  18. 18.27² =
  19. 19.22² =
  20. 20.24² =
  21. 21.14² =
  22. 22.22² =
  23. 23.21² =
  24. 24.18² =
  25. 25.26² =
  26. 26.17² =
  27. 27.27² =
  28. 28.28² =
  29. 29.14² =
  30. 30.13² =
  31. 31.29² =
  32. 32.23² =
  33. 33.23² =
  34. 34.22² =
  35. 35.16² =
  36. 36.15² =
  37. 37.19² =
  38. 38.21² =
  39. 39.16² =
  40. 40.25² =

Answer key

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

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