← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 30 · 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. 1.12² =
  2. 2.29² =
  3. 3.25² =
  4. 4.18² =
  5. 5.13² =
  6. 6.27² =
  7. 7.21² =
  8. 8.23² =
  9. 9.11² =
  10. 10.22² =
  11. 11.15² =
  12. 12.19² =
  13. 13.24² =
  14. 14.14² =
  15. 15.18² =
  16. 16.28² =
  17. 17.17² =
  18. 18.16² =
  19. 19.26² =
  20. 20.17² =
  21. 21.17² =
  22. 22.24² =
  23. 23.24² =
  24. 24.16² =
  25. 25.19² =
  26. 26.25² =
  27. 27.14² =
  28. 28.25² =
  29. 29.13² =
  30. 30.21² =
  31. 31.27² =
  32. 32.29² =
  33. 33.28² =
  34. 34.21² =
  35. 35.21² =
  36. 36.22² =
  37. 37.26² =
  38. 38.24² =
  39. 39.12² =
  40. 40.12² =

Answer key

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

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