← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 432 · 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. 1.21² =
  2. 2.16² =
  3. 3.26² =
  4. 4.22² =
  5. 5.11² =
  6. 6.14² =
  7. 7.28² =
  8. 8.17² =
  9. 9.29² =
  10. 10.27² =
  11. 11.13² =
  12. 12.15² =
  13. 13.12² =
  14. 14.23² =
  15. 15.19² =
  16. 16.25² =
  17. 17.24² =
  18. 18.23² =
  19. 19.18² =
  20. 20.14² =
  21. 21.18² =
  22. 22.12² =
  23. 23.17² =
  24. 24.21² =
  25. 25.11² =
  26. 26.11² =
  27. 27.19² =
  28. 28.28² =
  29. 29.21² =
  30. 30.12² =
  31. 31.27² =
  32. 32.14² =
  33. 33.21² =
  34. 34.21² =
  35. 35.24² =
  36. 36.13² =
  37. 37.29² =
  38. 38.13² =
  39. 39.13² =
  40. 40.28² =

Answer key

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

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