← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 579 · 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. 2.16² =
  3. 3.28² =
  4. 4.14² =
  5. 5.25² =
  6. 6.15² =
  7. 7.26² =
  8. 8.17² =
  9. 9.21² =
  10. 10.24² =
  11. 11.19² =
  12. 12.11² =
  13. 13.18² =
  14. 14.13² =
  15. 15.12² =
  16. 16.22² =
  17. 17.25² =
  18. 18.18² =
  19. 19.28² =
  20. 20.23² =
  21. 21.22² =
  22. 22.23² =
  23. 23.17² =
  24. 24.22² =
  25. 25.11² =
  26. 26.18² =
  27. 27.16² =
  28. 28.15² =
  29. 29.29² =
  30. 30.13² =
  31. 31.19² =
  32. 32.26² =
  33. 33.14² =
  34. 34.23² =
  35. 35.26² =
  36. 36.13² =
  37. 37.13² =
  38. 38.12² =
  39. 39.27² =
  40. 40.26² =

Answer key

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

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