← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 704 · 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. 1.13² =
  2. 2.18² =
  3. 3.28² =
  4. 4.27² =
  5. 5.14² =
  6. 6.11² =
  7. 7.15² =
  8. 8.29² =
  9. 9.24² =
  10. 10.17² =
  11. 11.25² =
  12. 12.12² =
  13. 13.22² =
  14. 14.21² =
  15. 15.16² =
  16. 16.23² =
  17. 17.19² =
  18. 18.26² =
  19. 19.28² =
  20. 20.24² =
  21. 21.25² =
  22. 22.25² =
  23. 23.22² =
  24. 24.13² =
  25. 25.13² =
  26. 26.29² =
  27. 27.16² =
  28. 28.14² =
  29. 29.15² =
  30. 30.22² =
  31. 31.15² =
  32. 32.13² =
  33. 33.27² =
  34. 34.12² =
  35. 35.24² =
  36. 36.22² =
  37. 37.25² =
  38. 38.27² =
  39. 39.25² =
  40. 40.19² =

Answer key

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

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