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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 342 · 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. 1.11² =
  2. 2.19² =
  3. 3.14² =
  4. 4.18² =
  5. 5.17² =
  6. 6.21² =
  7. 7.16² =
  8. 8.15² =
  9. 9.28² =
  10. 10.25² =
  11. 11.26² =
  12. 12.12² =
  13. 13.29² =
  14. 14.22² =
  15. 15.13² =
  16. 16.24² =
  17. 17.27² =
  18. 18.23² =
  19. 19.29² =
  20. 20.21² =
  21. 21.29² =
  22. 22.15² =
  23. 23.14² =
  24. 24.21² =
  25. 25.21² =
  26. 26.13² =
  27. 27.27² =
  28. 28.17² =
  29. 29.25² =
  30. 30.21² =
  31. 31.16² =
  32. 32.26² =
  33. 33.12² =
  34. 34.28² =
  35. 35.18² =
  36. 36.12² =
  37. 37.16² =
  38. 38.27² =
  39. 39.14² =
  40. 40.16² =

Answer key

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

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