← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 968 · 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. 2.21² =
  3. 3.13² =
  4. 4.15² =
  5. 5.14² =
  6. 6.19² =
  7. 7.11² =
  8. 8.26² =
  9. 9.23² =
  10. 10.28² =
  11. 11.29² =
  12. 12.27² =
  13. 13.18² =
  14. 14.12² =
  15. 15.25² =
  16. 16.24² =
  17. 17.14² =
  18. 18.25² =
  19. 19.17² =
  20. 20.22² =
  21. 21.17² =
  22. 22.22² =
  23. 23.22² =
  24. 24.14² =
  25. 25.17² =
  26. 26.12² =
  27. 27.22² =
  28. 28.14² =
  29. 29.23² =
  30. 30.18² =
  31. 31.15² =
  32. 32.18² =
  33. 33.14² =
  34. 34.17² =
  35. 35.25² =
  36. 36.12² =
  37. 37.13² =
  38. 38.24² =
  39. 39.29² =
  40. 40.17² =

Answer key

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

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