← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 958 · 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. 1.26² =
  2. 2.21² =
  3. 3.27² =
  4. 4.29² =
  5. 5.24² =
  6. 6.11² =
  7. 7.13² =
  8. 8.28² =
  9. 9.17² =
  10. 10.18² =
  11. 11.23² =
  12. 12.15² =
  13. 13.16² =
  14. 14.22² =
  15. 15.25² =
  16. 16.19² =
  17. 17.14² =
  18. 18.12² =
  19. 19.15² =
  20. 20.25² =
  21. 21.28² =
  22. 22.11² =
  23. 23.21² =
  24. 24.23² =
  25. 25.21² =
  26. 26.12² =
  27. 27.21² =
  28. 28.28² =
  29. 29.14² =
  30. 30.24² =
  31. 31.29² =
  32. 32.29² =
  33. 33.12² =
  34. 34.14² =
  35. 35.16² =
  36. 36.18² =
  37. 37.13² =
  38. 38.16² =
  39. 39.13² =
  40. 40.23² =

Answer key

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

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