← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 202 · 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. 1.11² =
  2. 2.18² =
  3. 3.21² =
  4. 4.28² =
  5. 5.13² =
  6. 6.23² =
  7. 7.16² =
  8. 8.19² =
  9. 9.17² =
  10. 10.12² =
  11. 11.26² =
  12. 12.22² =
  13. 13.14² =
  14. 14.27² =
  15. 15.24² =
  16. 16.15² =
  17. 17.29² =
  18. 18.25² =
  19. 19.23² =
  20. 20.24² =
  21. 21.23² =
  22. 22.26² =
  23. 23.25² =
  24. 24.28² =
  25. 25.16² =
  26. 26.18² =
  27. 27.12² =
  28. 28.21² =
  29. 29.24² =
  30. 30.13² =
  31. 31.17² =
  32. 32.27² =
  33. 33.19² =
  34. 34.22² =
  35. 35.28² =
  36. 36.29² =
  37. 37.27² =
  38. 38.23² =
  39. 39.29² =
  40. 40.14² =

Answer key

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

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