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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 707 · 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. 2.28² =
  3. 3.21² =
  4. 4.11² =
  5. 5.15² =
  6. 6.23² =
  7. 7.13² =
  8. 8.25² =
  9. 9.17² =
  10. 10.12² =
  11. 11.26² =
  12. 12.18² =
  13. 13.29² =
  14. 14.14² =
  15. 15.19² =
  16. 16.27² =
  17. 17.22² =
  18. 18.21² =
  19. 19.29² =
  20. 20.29² =
  21. 21.18² =
  22. 22.24² =
  23. 23.21² =
  24. 24.16² =
  25. 25.29² =
  26. 26.28² =
  27. 27.28² =
  28. 28.15² =
  29. 29.13² =
  30. 30.11² =
  31. 31.23² =
  32. 32.14² =
  33. 33.27² =
  34. 34.25² =
  35. 35.11² =
  36. 36.16² =
  37. 37.11² =
  38. 38.14² =
  39. 39.12² =
  40. 40.18² =

Answer key

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

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