← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 153 · 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. 1.16² =
  2. 2.15² =
  3. 3.21² =
  4. 4.22² =
  5. 5.27² =
  6. 6.26² =
  7. 7.13² =
  8. 8.19² =
  9. 9.12² =
  10. 10.11² =
  11. 11.28² =
  12. 12.29² =
  13. 13.17² =
  14. 14.23² =
  15. 15.14² =
  16. 16.14² =
  17. 17.27² =
  18. 18.18² =
  19. 19.24² =
  20. 20.25² =
  21. 21.13² =
  22. 22.24² =
  23. 23.12² =
  24. 24.28² =
  25. 25.16² =
  26. 26.15² =
  27. 27.23² =
  28. 28.25² =
  29. 29.22² =
  30. 30.13² =
  31. 31.28² =
  32. 32.29² =
  33. 33.21² =
  34. 34.22² =
  35. 35.15² =
  36. 36.27² =
  37. 37.11² =
  38. 38.26² =
  39. 39.14² =
  40. 40.19² =

Answer key

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

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