← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 965 · 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. 1.22² =
  2. 2.24² =
  3. 3.28² =
  4. 4.15² =
  5. 5.26² =
  6. 6.29² =
  7. 7.19² =
  8. 8.14² =
  9. 9.11² =
  10. 10.17² =
  11. 11.21² =
  12. 12.16² =
  13. 13.18² =
  14. 14.23² =
  15. 15.13² =
  16. 16.12² =
  17. 17.25² =
  18. 18.23² =
  19. 19.27² =
  20. 20.25² =
  21. 21.13² =
  22. 22.15² =
  23. 23.21² =
  24. 24.23² =
  25. 25.12² =
  26. 26.26² =
  27. 27.13² =
  28. 28.16² =
  29. 29.22² =
  30. 30.18² =
  31. 31.27² =
  32. 32.13² =
  33. 33.15² =
  34. 34.29² =
  35. 35.16² =
  36. 36.27² =
  37. 37.27² =
  38. 38.18² =
  39. 39.15² =
  40. 40.26² =

Answer key

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

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