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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 168 · 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. 2.18² =
  3. 3.21² =
  4. 4.27² =
  5. 5.28² =
  6. 6.17² =
  7. 7.29² =
  8. 8.24² =
  9. 9.19² =
  10. 10.14² =
  11. 11.15² =
  12. 12.13² =
  13. 13.12² =
  14. 14.23² =
  15. 15.11² =
  16. 16.25² =
  17. 17.26² =
  18. 18.22² =
  19. 19.11² =
  20. 20.12² =
  21. 21.14² =
  22. 22.24² =
  23. 23.15² =
  24. 24.19² =
  25. 25.11² =
  26. 26.17² =
  27. 27.21² =
  28. 28.14² =
  29. 29.29² =
  30. 30.13² =
  31. 31.23² =
  32. 32.29² =
  33. 33.15² =
  34. 34.17² =
  35. 35.14² =
  36. 36.25² =
  37. 37.24² =
  38. 38.22² =
  39. 39.18² =
  40. 40.18² =

Answer key

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

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