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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 110 · 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. 1.21² =
  2. 2.27² =
  3. 3.24² =
  4. 4.26² =
  5. 5.28² =
  6. 6.16² =
  7. 7.18² =
  8. 8.23² =
  9. 9.13² =
  10. 10.11² =
  11. 11.12² =
  12. 12.17² =
  13. 13.19² =
  14. 14.22² =
  15. 15.14² =
  16. 16.15² =
  17. 17.29² =
  18. 18.21² =
  19. 19.15² =
  20. 20.18² =
  21. 21.25² =
  22. 22.21² =
  23. 23.23² =
  24. 24.11² =
  25. 25.29² =
  26. 26.29² =
  27. 27.15² =
  28. 28.18² =
  29. 29.26² =
  30. 30.16² =
  31. 31.11² =
  32. 32.27² =
  33. 33.12² =
  34. 34.21² =
  35. 35.24² =
  36. 36.14² =
  37. 37.16² =
  38. 38.18² =
  39. 39.27² =
  40. 40.29² =

Answer key

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

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