← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 161 · 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. 1.28² =
  2. 2.19² =
  3. 3.14² =
  4. 4.12² =
  5. 5.24² =
  6. 6.16² =
  7. 7.13² =
  8. 8.23² =
  9. 9.15² =
  10. 10.21² =
  11. 11.27² =
  12. 12.26² =
  13. 13.17² =
  14. 14.25² =
  15. 15.18² =
  16. 16.11² =
  17. 17.15² =
  18. 18.22² =
  19. 19.12² =
  20. 20.29² =
  21. 21.15² =
  22. 22.25² =
  23. 23.21² =
  24. 24.11² =
  25. 25.13² =
  26. 26.24² =
  27. 27.26² =
  28. 28.17² =
  29. 29.24² =
  30. 30.12² =
  31. 31.11² =
  32. 32.15² =
  33. 33.22² =
  34. 34.26² =
  35. 35.23² =
  36. 36.24² =
  37. 37.16² =
  38. 38.23² =
  39. 39.12² =
  40. 40.19² =

Answer key

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

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