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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 95 · 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. 2.27² =
  3. 3.21² =
  4. 4.12² =
  5. 5.18² =
  6. 6.23² =
  7. 7.28² =
  8. 8.15² =
  9. 9.24² =
  10. 10.29² =
  11. 11.19² =
  12. 12.25² =
  13. 13.11² =
  14. 14.17² =
  15. 15.14² =
  16. 16.22² =
  17. 17.26² =
  18. 18.13² =
  19. 19.21² =
  20. 20.13² =
  21. 21.16² =
  22. 22.15² =
  23. 23.21² =
  24. 24.23² =
  25. 25.21² =
  26. 26.26² =
  27. 27.29² =
  28. 28.17² =
  29. 29.25² =
  30. 30.21² =
  31. 31.27² =
  32. 32.24² =
  33. 33.15² =
  34. 34.11² =
  35. 35.12² =
  36. 36.12² =
  37. 37.11² =
  38. 38.25² =
  39. 39.25² =
  40. 40.13² =

Answer key

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

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