← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 197 · 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. 1.13² =
  2. 2.29² =
  3. 3.16² =
  4. 4.26² =
  5. 5.21² =
  6. 6.11² =
  7. 7.17² =
  8. 8.12² =
  9. 9.18² =
  10. 10.25² =
  11. 11.23² =
  12. 12.28² =
  13. 13.15² =
  14. 14.24² =
  15. 15.27² =
  16. 16.19² =
  17. 17.14² =
  18. 18.27² =
  19. 19.22² =
  20. 20.18² =
  21. 21.11² =
  22. 22.24² =
  23. 23.16² =
  24. 24.21² =
  25. 25.21² =
  26. 26.16² =
  27. 27.11² =
  28. 28.27² =
  29. 29.28² =
  30. 30.22² =
  31. 31.25² =
  32. 32.18² =
  33. 33.21² =
  34. 34.18² =
  35. 35.23² =
  36. 36.27² =
  37. 37.13² =
  38. 38.24² =
  39. 39.14² =
  40. 40.12² =

Answer key

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

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