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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 169 · 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. 1.27² =
  2. 2.26² =
  3. 3.19² =
  4. 4.18² =
  5. 5.15² =
  6. 6.13² =
  7. 7.25² =
  8. 8.16² =
  9. 9.23² =
  10. 10.28² =
  11. 11.11² =
  12. 12.14² =
  13. 13.12² =
  14. 14.21² =
  15. 15.24² =
  16. 16.22² =
  17. 17.14² =
  18. 18.29² =
  19. 19.17² =
  20. 20.16² =
  21. 21.23² =
  22. 22.25² =
  23. 23.22² =
  24. 24.12² =
  25. 25.28² =
  26. 26.18² =
  27. 27.14² =
  28. 28.25² =
  29. 29.19² =
  30. 30.12² =
  31. 31.21² =
  32. 32.28² =
  33. 33.14² =
  34. 34.23² =
  35. 35.29² =
  36. 36.12² =
  37. 37.27² =
  38. 38.23² =
  39. 39.19² =
  40. 40.18² =

Answer key

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

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