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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 401 · 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. 1.14² =
  2. 2.23² =
  3. 3.26² =
  4. 4.16² =
  5. 5.22² =
  6. 6.18² =
  7. 7.11² =
  8. 8.12² =
  9. 9.28² =
  10. 10.19² =
  11. 11.15² =
  12. 12.29² =
  13. 13.25² =
  14. 14.17² =
  15. 15.13² =
  16. 16.24² =
  17. 17.21² =
  18. 18.27² =
  19. 19.27² =
  20. 20.19² =
  21. 21.18² =
  22. 22.15² =
  23. 23.16² =
  24. 24.12² =
  25. 25.21² =
  26. 26.21² =
  27. 27.25² =
  28. 28.16² =
  29. 29.14² =
  30. 30.27² =
  31. 31.14² =
  32. 32.12² =
  33. 33.21² =
  34. 34.23² =
  35. 35.22² =
  36. 36.26² =
  37. 37.15² =
  38. 38.26² =
  39. 39.11² =
  40. 40.23² =

Answer key

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

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