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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 721 · 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. 1.27² =
  2. 2.17² =
  3. 3.19² =
  4. 4.25² =
  5. 5.15² =
  6. 6.21² =
  7. 7.13² =
  8. 8.12² =
  9. 9.18² =
  10. 10.24² =
  11. 11.22² =
  12. 12.29² =
  13. 13.14² =
  14. 14.23² =
  15. 15.16² =
  16. 16.26² =
  17. 17.11² =
  18. 18.28² =
  19. 19.14² =
  20. 20.25² =
  21. 21.11² =
  22. 22.11² =
  23. 23.15² =
  24. 24.25² =
  25. 25.24² =
  26. 26.28² =
  27. 27.14² =
  28. 28.23² =
  29. 29.16² =
  30. 30.13² =
  31. 31.21² =
  32. 32.24² =
  33. 33.11² =
  34. 34.21² =
  35. 35.14² =
  36. 36.25² =
  37. 37.15² =
  38. 38.26² =
  39. 39.19² =
  40. 40.26² =

Answer key

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

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