← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 465 · 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. 1.12² =
  2. 2.22² =
  3. 3.14² =
  4. 4.27² =
  5. 5.21² =
  6. 6.15² =
  7. 7.17² =
  8. 8.11² =
  9. 9.29² =
  10. 10.18² =
  11. 11.25² =
  12. 12.16² =
  13. 13.13² =
  14. 14.26² =
  15. 15.23² =
  16. 16.19² =
  17. 17.28² =
  18. 18.23² =
  19. 19.12² =
  20. 20.19² =
  21. 21.29² =
  22. 22.24² =
  23. 23.28² =
  24. 24.27² =
  25. 25.15² =
  26. 26.17² =
  27. 27.12² =
  28. 28.24² =
  29. 29.28² =
  30. 30.29² =
  31. 31.14² =
  32. 32.18² =
  33. 33.29² =
  34. 34.12² =
  35. 35.22² =
  36. 36.23² =
  37. 37.18² =
  38. 38.25² =
  39. 39.25² =
  40. 40.24² =

Answer key

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

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