← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 326 · 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. 2.16² =
  3. 3.26² =
  4. 4.25² =
  5. 5.24² =
  6. 6.18² =
  7. 7.15² =
  8. 8.12² =
  9. 9.21² =
  10. 10.29² =
  11. 11.27² =
  12. 12.22² =
  13. 13.11² =
  14. 14.19² =
  15. 15.23² =
  16. 16.28² =
  17. 17.12² =
  18. 18.17² =
  19. 19.13² =
  20. 20.26² =
  21. 21.16² =
  22. 22.14² =
  23. 23.22² =
  24. 24.23² =
  25. 25.28² =
  26. 26.11² =
  27. 27.21² =
  28. 28.11² =
  29. 29.23² =
  30. 30.16² =
  31. 31.24² =
  32. 32.24² =
  33. 33.25² =
  34. 34.22² =
  35. 35.14² =
  36. 36.21² =
  37. 37.23² =
  38. 38.17² =
  39. 39.25² =
  40. 40.24² =

Answer key

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

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