← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 239 · 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. 1.16² =
  2. 2.26² =
  3. 3.19² =
  4. 4.22² =
  5. 5.17² =
  6. 6.24² =
  7. 7.14² =
  8. 8.13² =
  9. 9.28² =
  10. 10.27² =
  11. 11.11² =
  12. 12.25² =
  13. 13.21² =
  14. 14.29² =
  15. 15.23² =
  16. 16.15² =
  17. 17.11² =
  18. 18.12² =
  19. 19.18² =
  20. 20.22² =
  21. 21.24² =
  22. 22.25² =
  23. 23.13² =
  24. 24.26² =
  25. 25.24² =
  26. 26.19² =
  27. 27.22² =
  28. 28.19² =
  29. 29.19² =
  30. 30.25² =
  31. 31.22² =
  32. 32.16² =
  33. 33.19² =
  34. 34.26² =
  35. 35.25² =
  36. 36.27² =
  37. 37.27² =
  38. 38.28² =
  39. 39.16² =
  40. 40.17² =

Answer key

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

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