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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 333 · 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. 2.19² =
  3. 3.13² =
  4. 4.17² =
  5. 5.27² =
  6. 6.29² =
  7. 7.24² =
  8. 8.21² =
  9. 9.11² =
  10. 10.18² =
  11. 11.15² =
  12. 12.23² =
  13. 13.12² =
  14. 14.28² =
  15. 15.14² =
  16. 16.25² =
  17. 17.22² =
  18. 18.26² =
  19. 19.16² =
  20. 20.25² =
  21. 21.18² =
  22. 22.13² =
  23. 23.28² =
  24. 24.12² =
  25. 25.28² =
  26. 26.25² =
  27. 27.29² =
  28. 28.21² =
  29. 29.16² =
  30. 30.16² =
  31. 31.21² =
  32. 32.21² =
  33. 33.29² =
  34. 34.27² =
  35. 35.27² =
  36. 36.27² =
  37. 37.21² =
  38. 38.16² =
  39. 39.25² =
  40. 40.14² =

Answer key

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

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