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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 785 · 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. 3.13² =
  4. 4.27² =
  5. 5.12² =
  6. 6.11² =
  7. 7.21² =
  8. 8.18² =
  9. 9.22² =
  10. 10.29² =
  11. 11.17² =
  12. 12.19² =
  13. 13.24² =
  14. 14.23² =
  15. 15.15² =
  16. 16.28² =
  17. 17.26² =
  18. 18.27² =
  19. 19.13² =
  20. 20.14² =
  21. 21.29² =
  22. 22.14² =
  23. 23.26² =
  24. 24.26² =
  25. 25.14² =
  26. 26.25² =
  27. 27.19² =
  28. 28.21² =
  29. 29.11² =
  30. 30.28² =
  31. 31.14² =
  32. 32.14² =
  33. 33.13² =
  34. 34.18² =
  35. 35.22² =
  36. 36.24² =
  37. 37.16² =
  38. 38.29² =
  39. 39.14² =
  40. 40.18² =

Answer key

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

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