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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 42 · 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. 1.12² =
  2. 2.26² =
  3. 3.13² =
  4. 4.22² =
  5. 5.17² =
  6. 6.24² =
  7. 7.18² =
  8. 8.11² =
  9. 9.19² =
  10. 10.28² =
  11. 11.25² =
  12. 12.27² =
  13. 13.23² =
  14. 14.15² =
  15. 15.21² =
  16. 16.29² =
  17. 17.14² =
  18. 18.16² =
  19. 19.14² =
  20. 20.26² =
  21. 21.29² =
  22. 22.15² =
  23. 23.12² =
  24. 24.12² =
  25. 25.17² =
  26. 26.29² =
  27. 27.22² =
  28. 28.15² =
  29. 29.29² =
  30. 30.21² =
  31. 31.26² =
  32. 32.16² =
  33. 33.27² =
  34. 34.23² =
  35. 35.14² =
  36. 36.11² =
  37. 37.18² =
  38. 38.18² =
  39. 39.11² =
  40. 40.18² =

Answer key

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

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