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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 422 · 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. 1.25² =
  2. 2.16² =
  3. 3.15² =
  4. 4.24² =
  5. 5.11² =
  6. 6.19² =
  7. 7.14² =
  8. 8.29² =
  9. 9.26² =
  10. 10.17² =
  11. 11.27² =
  12. 12.28² =
  13. 13.23² =
  14. 14.12² =
  15. 15.18² =
  16. 16.21² =
  17. 17.13² =
  18. 18.19² =
  19. 19.22² =
  20. 20.17² =
  21. 21.26² =
  22. 22.21² =
  23. 23.26² =
  24. 24.25² =
  25. 25.15² =
  26. 26.15² =
  27. 27.13² =
  28. 28.25² =
  29. 29.15² =
  30. 30.27² =
  31. 31.21² =
  32. 32.15² =
  33. 33.27² =
  34. 34.29² =
  35. 35.15² =
  36. 36.13² =
  37. 37.17² =
  38. 38.16² =
  39. 39.11² =
  40. 40.11² =

Answer key

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

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