← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 14 · 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. 2.22² =
  3. 3.21² =
  4. 4.23² =
  5. 5.13² =
  6. 6.19² =
  7. 7.15² =
  8. 8.11² =
  9. 9.29² =
  10. 10.18² =
  11. 11.28² =
  12. 12.26² =
  13. 13.17² =
  14. 14.16² =
  15. 15.14² =
  16. 16.26² =
  17. 17.24² =
  18. 18.27² =
  19. 19.22² =
  20. 20.12² =
  21. 21.23² =
  22. 22.11² =
  23. 23.12² =
  24. 24.13² =
  25. 25.16² =
  26. 26.18² =
  27. 27.21² =
  28. 28.29² =
  29. 29.11² =
  30. 30.25² =
  31. 31.19² =
  32. 32.22² =
  33. 33.18² =
  34. 34.27² =
  35. 35.14² =
  36. 36.13² =
  37. 37.24² =
  38. 38.16² =
  39. 39.22² =
  40. 40.29² =

Answer key

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

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