← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 339 · 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. 1.11² =
  2. 2.17² =
  3. 3.26² =
  4. 4.16² =
  5. 5.13² =
  6. 6.12² =
  7. 7.28² =
  8. 8.19² =
  9. 9.21² =
  10. 10.29² =
  11. 11.27² =
  12. 12.23² =
  13. 13.14² =
  14. 14.25² =
  15. 15.18² =
  16. 16.24² =
  17. 17.15² =
  18. 18.22² =
  19. 19.19² =
  20. 20.19² =
  21. 21.15² =
  22. 22.13² =
  23. 23.26² =
  24. 24.25² =
  25. 25.14² =
  26. 26.29² =
  27. 27.11² =
  28. 28.13² =
  29. 29.22² =
  30. 30.24² =
  31. 31.21² =
  32. 32.29² =
  33. 33.16² =
  34. 34.28² =
  35. 35.24² =
  36. 36.28² =
  37. 37.15² =
  38. 38.17² =
  39. 39.29² =
  40. 40.12² =

Answer key

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

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