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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 743 · 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. 1.24² =
  2. 2.11² =
  3. 3.17² =
  4. 4.16² =
  5. 5.18² =
  6. 6.13² =
  7. 7.15² =
  8. 8.19² =
  9. 9.25² =
  10. 10.29² =
  11. 11.27² =
  12. 12.21² =
  13. 13.28² =
  14. 14.23² =
  15. 15.12² =
  16. 16.26² =
  17. 17.22² =
  18. 18.19² =
  19. 19.24² =
  20. 20.14² =
  21. 21.21² =
  22. 22.21² =
  23. 23.13² =
  24. 24.18² =
  25. 25.11² =
  26. 26.11² =
  27. 27.14² =
  28. 28.14² =
  29. 29.25² =
  30. 30.27² =
  31. 31.16² =
  32. 32.29² =
  33. 33.12² =
  34. 34.23² =
  35. 35.11² =
  36. 36.12² =
  37. 37.17² =
  38. 38.19² =
  39. 39.27² =
  40. 40.26² =

Answer key

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

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