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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 694 · 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. 1.15² =
  2. 2.24² =
  3. 3.29² =
  4. 4.23² =
  5. 5.22² =
  6. 6.16² =
  7. 7.11² =
  8. 8.25² =
  9. 9.17² =
  10. 10.14² =
  11. 11.18² =
  12. 12.12² =
  13. 13.27² =
  14. 14.21² =
  15. 15.21² =
  16. 16.19² =
  17. 17.28² =
  18. 18.13² =
  19. 19.25² =
  20. 20.24² =
  21. 21.26² =
  22. 22.22² =
  23. 23.23² =
  24. 24.12² =
  25. 25.17² =
  26. 26.24² =
  27. 27.21² =
  28. 28.29² =
  29. 29.21² =
  30. 30.28² =
  31. 31.14² =
  32. 32.15² =
  33. 33.28² =
  34. 34.24² =
  35. 35.13² =
  36. 36.29² =
  37. 37.29² =
  38. 38.14² =
  39. 39.16² =
  40. 40.25² =

Answer key

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

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