← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 427 · 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. 1.22² =
  2. 2.13² =
  3. 3.21² =
  4. 4.23² =
  5. 5.29² =
  6. 6.14² =
  7. 7.17² =
  8. 8.26² =
  9. 9.24² =
  10. 10.19² =
  11. 11.12² =
  12. 12.16² =
  13. 13.18² =
  14. 14.11² =
  15. 15.25² =
  16. 16.15² =
  17. 17.28² =
  18. 18.27² =
  19. 19.23² =
  20. 20.19² =
  21. 21.11² =
  22. 22.11² =
  23. 23.27² =
  24. 24.27² =
  25. 25.21² =
  26. 26.25² =
  27. 27.26² =
  28. 28.23² =
  29. 29.17² =
  30. 30.11² =
  31. 31.24² =
  32. 32.25² =
  33. 33.12² =
  34. 34.22² =
  35. 35.17² =
  36. 36.26² =
  37. 37.27² =
  38. 38.23² =
  39. 39.14² =
  40. 40.12² =

Answer key

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

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