← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 3 · 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. 1.11² =
  2. 2.21² =
  3. 3.23² =
  4. 4.19² =
  5. 5.25² =
  6. 6.29² =
  7. 7.14² =
  8. 8.15² =
  9. 9.28² =
  10. 10.16² =
  11. 11.24² =
  12. 12.13² =
  13. 13.27² =
  14. 14.12² =
  15. 15.17² =
  16. 16.26² =
  17. 17.22² =
  18. 18.18² =
  19. 19.22² =
  20. 20.25² =
  21. 21.23² =
  22. 22.28² =
  23. 23.25² =
  24. 24.22² =
  25. 25.28² =
  26. 26.21² =
  27. 27.29² =
  28. 28.29² =
  29. 29.15² =
  30. 30.28² =
  31. 31.22² =
  32. 32.29² =
  33. 33.24² =
  34. 34.21² =
  35. 35.27² =
  36. 36.11² =
  37. 37.27² =
  38. 38.11² =
  39. 39.22² =
  40. 40.26² =

Answer key

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

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