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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 80 · 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. 2.27² =
  3. 3.18² =
  4. 4.13² =
  5. 5.22² =
  6. 6.16² =
  7. 7.15² =
  8. 8.23² =
  9. 9.14² =
  10. 10.11² =
  11. 11.21² =
  12. 12.28² =
  13. 13.26² =
  14. 14.25² =
  15. 15.24² =
  16. 16.12² =
  17. 17.29² =
  18. 18.29² =
  19. 19.13² =
  20. 20.17² =
  21. 21.14² =
  22. 22.29² =
  23. 23.21² =
  24. 24.19² =
  25. 25.29² =
  26. 26.11² =
  27. 27.13² =
  28. 28.18² =
  29. 29.14² =
  30. 30.21² =
  31. 31.24² =
  32. 32.28² =
  33. 33.28² =
  34. 34.14² =
  35. 35.21² =
  36. 36.29² =
  37. 37.16² =
  38. 38.14² =
  39. 39.29² =
  40. 40.29² =

Answer key

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

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