← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 72 · 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. 1.11² =
  2. 2.23² =
  3. 3.12² =
  4. 4.15² =
  5. 5.25² =
  6. 6.29² =
  7. 7.24² =
  8. 8.19² =
  9. 9.14² =
  10. 10.22² =
  11. 11.26² =
  12. 12.13² =
  13. 13.21² =
  14. 14.27² =
  15. 15.28² =
  16. 16.18² =
  17. 17.12² =
  18. 18.16² =
  19. 19.26² =
  20. 20.17² =
  21. 21.23² =
  22. 22.25² =
  23. 23.27² =
  24. 24.25² =
  25. 25.17² =
  26. 26.17² =
  27. 27.28² =
  28. 28.13² =
  29. 29.23² =
  30. 30.13² =
  31. 31.25² =
  32. 32.21² =
  33. 33.13² =
  34. 34.17² =
  35. 35.25² =
  36. 36.28² =
  37. 37.19² =
  38. 38.29² =
  39. 39.24² =
  40. 40.26² =

Answer key

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

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