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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 882 · 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. 1.16² =
  2. 2.25² =
  3. 3.24² =
  4. 4.13² =
  5. 5.12² =
  6. 6.15² =
  7. 7.28² =
  8. 8.21² =
  9. 9.11² =
  10. 10.18² =
  11. 11.17² =
  12. 12.19² =
  13. 13.23² =
  14. 14.14² =
  15. 15.22² =
  16. 16.26² =
  17. 17.26² =
  18. 18.29² =
  19. 19.21² =
  20. 20.15² =
  21. 21.27² =
  22. 22.28² =
  23. 23.15² =
  24. 24.17² =
  25. 25.11² =
  26. 26.25² =
  27. 27.21² =
  28. 28.16² =
  29. 29.21² =
  30. 30.17² =
  31. 31.27² =
  32. 32.27² =
  33. 33.23² =
  34. 34.26² =
  35. 35.23² =
  36. 36.14² =
  37. 37.14² =
  38. 38.13² =
  39. 39.23² =
  40. 40.27² =

Answer key

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

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