← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 305 · 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. 1.26² =
  2. 2.19² =
  3. 3.12² =
  4. 4.29² =
  5. 5.14² =
  6. 6.21² =
  7. 7.24² =
  8. 8.27² =
  9. 9.15² =
  10. 10.22² =
  11. 11.13² =
  12. 12.28² =
  13. 13.18² =
  14. 14.25² =
  15. 15.11² =
  16. 16.17² =
  17. 17.29² =
  18. 18.29² =
  19. 19.21² =
  20. 20.23² =
  21. 21.22² =
  22. 22.16² =
  23. 23.24² =
  24. 24.14² =
  25. 25.27² =
  26. 26.24² =
  27. 27.17² =
  28. 28.24² =
  29. 29.16² =
  30. 30.23² =
  31. 31.11² =
  32. 32.15² =
  33. 33.11² =
  34. 34.25² =
  35. 35.25² =
  36. 36.11² =
  37. 37.12² =
  38. 38.27² =
  39. 39.19² =
  40. 40.12² =

Answer key

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

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