← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 746 · 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. 2.12² =
  3. 3.28² =
  4. 4.17² =
  5. 5.24² =
  6. 6.15² =
  7. 7.21² =
  8. 8.13² =
  9. 9.26² =
  10. 10.27² =
  11. 11.29² =
  12. 12.25² =
  13. 13.18² =
  14. 14.11² =
  15. 15.16² =
  16. 16.16² =
  17. 17.22² =
  18. 18.23² =
  19. 19.14² =
  20. 20.18² =
  21. 21.19² =
  22. 22.15² =
  23. 23.27² =
  24. 24.12² =
  25. 25.13² =
  26. 26.15² =
  27. 27.15² =
  28. 28.19² =
  29. 29.22² =
  30. 30.21² =
  31. 31.18² =
  32. 32.12² =
  33. 33.24² =
  34. 34.18² =
  35. 35.16² =
  36. 36.12² =
  37. 37.13² =
  38. 38.24² =
  39. 39.24² =
  40. 40.12² =

Answer key

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

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