← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 463 · 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. 1.17² =
  2. 2.27² =
  3. 3.25² =
  4. 4.13² =
  5. 5.23² =
  6. 6.18² =
  7. 7.16² =
  8. 8.21² =
  9. 9.14² =
  10. 10.11² =
  11. 11.22² =
  12. 12.12² =
  13. 13.26² =
  14. 14.24² =
  15. 15.15² =
  16. 16.19² =
  17. 17.28² =
  18. 18.29² =
  19. 19.27² =
  20. 20.13² =
  21. 21.11² =
  22. 22.26² =
  23. 23.27² =
  24. 24.29² =
  25. 25.14² =
  26. 26.17² =
  27. 27.25² =
  28. 28.11² =
  29. 29.18² =
  30. 30.11² =
  31. 31.24² =
  32. 32.12² =
  33. 33.24² =
  34. 34.26² =
  35. 35.13² =
  36. 36.22² =
  37. 37.29² =
  38. 38.29² =
  39. 39.25² =
  40. 40.11² =

Answer key

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

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