← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 268 · 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. 1.25² =
  2. 2.19² =
  3. 3.27² =
  4. 4.21² =
  5. 5.23² =
  6. 6.16² =
  7. 7.17² =
  8. 8.11² =
  9. 9.15² =
  10. 10.12² =
  11. 11.26² =
  12. 12.14² =
  13. 13.24² =
  14. 14.22² =
  15. 15.13² =
  16. 16.14² =
  17. 17.13² =
  18. 18.18² =
  19. 19.28² =
  20. 20.29² =
  21. 21.27² =
  22. 22.17² =
  23. 23.22² =
  24. 24.13² =
  25. 25.27² =
  26. 26.15² =
  27. 27.18² =
  28. 28.25² =
  29. 29.27² =
  30. 30.24² =
  31. 31.22² =
  32. 32.24² =
  33. 33.23² =
  34. 34.23² =
  35. 35.13² =
  36. 36.26² =
  37. 37.29² =
  38. 38.14² =
  39. 39.13² =
  40. 40.19² =

Answer key

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

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