← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 27 · 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. 2.26² =
  3. 3.25² =
  4. 4.22² =
  5. 5.13² =
  6. 6.23² =
  7. 7.15² =
  8. 8.11² =
  9. 9.21² =
  10. 10.18² =
  11. 11.29² =
  12. 12.14² =
  13. 13.27² =
  14. 14.24² =
  15. 15.17² =
  16. 16.28² =
  17. 17.16² =
  18. 18.19² =
  19. 19.15² =
  20. 20.13² =
  21. 21.16² =
  22. 22.27² =
  23. 23.14² =
  24. 24.12² =
  25. 25.29² =
  26. 26.18² =
  27. 27.22² =
  28. 28.29² =
  29. 29.18² =
  30. 30.28² =
  31. 31.16² =
  32. 32.19² =
  33. 33.15² =
  34. 34.23² =
  35. 35.12² =
  36. 36.25² =
  37. 37.14² =
  38. 38.29² =
  39. 39.25² =
  40. 40.25² =

Answer key

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

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