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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 629 · 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. 1.24² =
  2. 2.19² =
  3. 3.13² =
  4. 4.25² =
  5. 5.17² =
  6. 6.26² =
  7. 7.14² =
  8. 8.15² =
  9. 9.16² =
  10. 10.11² =
  11. 11.21² =
  12. 12.29² =
  13. 13.23² =
  14. 14.27² =
  15. 15.28² =
  16. 16.27² =
  17. 17.18² =
  18. 18.22² =
  19. 19.14² =
  20. 20.12² =
  21. 21.25² =
  22. 22.18² =
  23. 23.25² =
  24. 24.15² =
  25. 25.26² =
  26. 26.21² =
  27. 27.29² =
  28. 28.29² =
  29. 29.21² =
  30. 30.13² =
  31. 31.22² =
  32. 32.21² =
  33. 33.21² =
  34. 34.12² =
  35. 35.14² =
  36. 36.11² =
  37. 37.13² =
  38. 38.18² =
  39. 39.27² =
  40. 40.27² =

Answer key

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

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