← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 159 · 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. 1.19² =
  2. 2.24² =
  3. 3.14² =
  4. 4.27² =
  5. 5.22² =
  6. 6.12² =
  7. 7.17² =
  8. 8.18² =
  9. 9.26² =
  10. 10.28² =
  11. 11.13² =
  12. 12.25² =
  13. 13.15² =
  14. 14.16² =
  15. 15.29² =
  16. 16.21² =
  17. 17.23² =
  18. 18.13² =
  19. 19.23² =
  20. 20.29² =
  21. 21.17² =
  22. 22.25² =
  23. 23.12² =
  24. 24.22² =
  25. 25.11² =
  26. 26.24² =
  27. 27.18² =
  28. 28.24² =
  29. 29.16² =
  30. 30.22² =
  31. 31.22² =
  32. 32.14² =
  33. 33.11² =
  34. 34.21² =
  35. 35.29² =
  36. 36.16² =
  37. 37.27² =
  38. 38.14² =
  39. 39.24² =
  40. 40.18² =

Answer key

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

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