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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 301 · 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. 1.13² =
  2. 2.16² =
  3. 3.29² =
  4. 4.11² =
  5. 5.24² =
  6. 6.19² =
  7. 7.21² =
  8. 8.22² =
  9. 9.14² =
  10. 10.26² =
  11. 11.12² =
  12. 12.25² =
  13. 13.15² =
  14. 14.28² =
  15. 15.27² =
  16. 16.23² =
  17. 17.18² =
  18. 18.17² =
  19. 19.27² =
  20. 20.15² =
  21. 21.15² =
  22. 22.11² =
  23. 23.26² =
  24. 24.21² =
  25. 25.14² =
  26. 26.21² =
  27. 27.15² =
  28. 28.25² =
  29. 29.21² =
  30. 30.18² =
  31. 31.21² =
  32. 32.26² =
  33. 33.11² =
  34. 34.16² =
  35. 35.25² =
  36. 36.21² =
  37. 37.13² =
  38. 38.25² =
  39. 39.26² =
  40. 40.21² =

Answer key

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

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