← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 823 · 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. 3.12² =
  4. 4.26² =
  5. 5.18² =
  6. 6.25² =
  7. 7.22² =
  8. 8.15² =
  9. 9.24² =
  10. 10.14² =
  11. 11.29² =
  12. 12.11² =
  13. 13.28² =
  14. 14.21² =
  15. 15.23² =
  16. 16.19² =
  17. 17.17² =
  18. 18.13² =
  19. 19.12² =
  20. 20.12² =
  21. 21.27² =
  22. 22.18² =
  23. 23.16² =
  24. 24.26² =
  25. 25.28² =
  26. 26.28² =
  27. 27.14² =
  28. 28.26² =
  29. 29.24² =
  30. 30.11² =
  31. 31.19² =
  32. 32.26² =
  33. 33.29² =
  34. 34.16² =
  35. 35.18² =
  36. 36.27² =
  37. 37.27² =
  38. 38.11² =
  39. 39.15² =
  40. 40.22² =

Answer key

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

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