← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 894 · 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. 2.23² =
  3. 3.19² =
  4. 4.18² =
  5. 5.24² =
  6. 6.29² =
  7. 7.27² =
  8. 8.15² =
  9. 9.28² =
  10. 10.16² =
  11. 11.11² =
  12. 12.26² =
  13. 13.14² =
  14. 14.21² =
  15. 15.22² =
  16. 16.17² =
  17. 17.13² =
  18. 18.12² =
  19. 19.24² =
  20. 20.16² =
  21. 21.26² =
  22. 22.14² =
  23. 23.24² =
  24. 24.16² =
  25. 25.23² =
  26. 26.26² =
  27. 27.19² =
  28. 28.22² =
  29. 29.17² =
  30. 30.12² =
  31. 31.29² =
  32. 32.17² =
  33. 33.17² =
  34. 34.19² =
  35. 35.16² =
  36. 36.29² =
  37. 37.17² =
  38. 38.13² =
  39. 39.25² =
  40. 40.15² =

Answer key

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

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