← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 590 · 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. 2.28² =
  3. 3.27² =
  4. 4.24² =
  5. 5.18² =
  6. 6.15² =
  7. 7.14² =
  8. 8.29² =
  9. 9.25² =
  10. 10.13² =
  11. 11.23² =
  12. 12.21² =
  13. 13.11² =
  14. 14.16² =
  15. 15.17² =
  16. 16.12² =
  17. 17.22² =
  18. 18.26² =
  19. 19.12² =
  20. 20.11² =
  21. 21.29² =
  22. 22.11² =
  23. 23.25² =
  24. 24.19² =
  25. 25.13² =
  26. 26.16² =
  27. 27.17² =
  28. 28.27² =
  29. 29.22² =
  30. 30.26² =
  31. 31.28² =
  32. 32.18² =
  33. 33.24² =
  34. 34.15² =
  35. 35.21² =
  36. 36.18² =
  37. 37.23² =
  38. 38.27² =
  39. 39.18² =
  40. 40.15² =

Answer key

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

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