← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 607 · 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. 1.16² =
  2. 2.21² =
  3. 3.23² =
  4. 4.17² =
  5. 5.15² =
  6. 6.28² =
  7. 7.24² =
  8. 8.22² =
  9. 9.13² =
  10. 10.27² =
  11. 11.11² =
  12. 12.18² =
  13. 13.19² =
  14. 14.29² =
  15. 15.12² =
  16. 16.14² =
  17. 17.25² =
  18. 18.23² =
  19. 19.21² =
  20. 20.26² =
  21. 21.26² =
  22. 22.29² =
  23. 23.28² =
  24. 24.22² =
  25. 25.26² =
  26. 26.27² =
  27. 27.27² =
  28. 28.21² =
  29. 29.12² =
  30. 30.13² =
  31. 31.19² =
  32. 32.13² =
  33. 33.14² =
  34. 34.12² =
  35. 35.13² =
  36. 36.16² =
  37. 37.21² =
  38. 38.17² =
  39. 39.22² =
  40. 40.23² =

Answer key

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

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