← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 267 · 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. 1.19² =
  2. 2.13² =
  3. 3.22² =
  4. 4.15² =
  5. 5.21² =
  6. 6.11² =
  7. 7.23² =
  8. 8.24² =
  9. 9.14² =
  10. 10.28² =
  11. 11.29² =
  12. 12.16² =
  13. 13.17² =
  14. 14.25² =
  15. 15.18² =
  16. 16.26² =
  17. 17.12² =
  18. 18.27² =
  19. 19.16² =
  20. 20.25² =
  21. 21.24² =
  22. 22.28² =
  23. 23.23² =
  24. 24.13² =
  25. 25.21² =
  26. 26.21² =
  27. 27.15² =
  28. 28.28² =
  29. 29.19² =
  30. 30.24² =
  31. 31.22² =
  32. 32.14² =
  33. 33.15² =
  34. 34.24² =
  35. 35.25² =
  36. 36.22² =
  37. 37.21² =
  38. 38.15² =
  39. 39.23² =
  40. 40.29² =

Answer key

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

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