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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 733 · 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. 1.17² =
  2. 2.25² =
  3. 3.11² =
  4. 4.13² =
  5. 5.21² =
  6. 6.27² =
  7. 7.18² =
  8. 8.16² =
  9. 9.22² =
  10. 10.23² =
  11. 11.14² =
  12. 12.26² =
  13. 13.24² =
  14. 14.17² =
  15. 15.12² =
  16. 16.15² =
  17. 17.19² =
  18. 18.29² =
  19. 19.28² =
  20. 20.27² =
  21. 21.25² =
  22. 22.14² =
  23. 23.21² =
  24. 24.12² =
  25. 25.17² =
  26. 26.19² =
  27. 27.23² =
  28. 28.11² =
  29. 29.21² =
  30. 30.19² =
  31. 31.16² =
  32. 32.11² =
  33. 33.11² =
  34. 34.27² =
  35. 35.11² =
  36. 36.25² =
  37. 37.12² =
  38. 38.19² =
  39. 39.26² =
  40. 40.23² =

Answer key

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

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