← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 667 · 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. 1.12² =
  2. 2.17² =
  3. 3.16² =
  4. 4.15² =
  5. 5.27² =
  6. 6.14² =
  7. 7.18² =
  8. 8.21² =
  9. 9.28² =
  10. 10.23² =
  11. 11.29² =
  12. 12.25² =
  13. 13.26² =
  14. 14.22² =
  15. 15.24² =
  16. 16.11² =
  17. 17.13² =
  18. 18.29² =
  19. 19.27² =
  20. 20.21² =
  21. 21.19² =
  22. 22.27² =
  23. 23.22² =
  24. 24.26² =
  25. 25.16² =
  26. 26.29² =
  27. 27.27² =
  28. 28.12² =
  29. 29.23² =
  30. 30.13² =
  31. 31.22² =
  32. 32.21² =
  33. 33.24² =
  34. 34.12² =
  35. 35.24² =
  36. 36.22² =
  37. 37.21² =
  38. 38.11² =
  39. 39.24² =
  40. 40.19² =

Answer key

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

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