← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 495 · 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. 1.28² =
  2. 2.23² =
  3. 3.21² =
  4. 4.25² =
  5. 5.27² =
  6. 6.22² =
  7. 7.17² =
  8. 8.15² =
  9. 9.14² =
  10. 10.18² =
  11. 11.26² =
  12. 12.29² =
  13. 13.16² =
  14. 14.24² =
  15. 15.12² =
  16. 16.11² =
  17. 17.13² =
  18. 18.28² =
  19. 19.24² =
  20. 20.18² =
  21. 21.19² =
  22. 22.18² =
  23. 23.27² =
  24. 24.23² =
  25. 25.17² =
  26. 26.23² =
  27. 27.26² =
  28. 28.24² =
  29. 29.12² =
  30. 30.22² =
  31. 31.19² =
  32. 32.26² =
  33. 33.13² =
  34. 34.26² =
  35. 35.25² =
  36. 36.21² =
  37. 37.29² =
  38. 38.11² =
  39. 39.22² =
  40. 40.21² =

Answer key

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

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