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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 871 · 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. 1.26² =
  2. 2.27² =
  3. 3.11² =
  4. 4.13² =
  5. 5.16² =
  6. 6.18² =
  7. 7.17² =
  8. 8.15² =
  9. 9.28² =
  10. 10.25² =
  11. 11.12² =
  12. 12.21² =
  13. 13.24² =
  14. 14.22² =
  15. 15.23² =
  16. 16.19² =
  17. 17.11² =
  18. 18.14² =
  19. 19.28² =
  20. 20.29² =
  21. 21.27² =
  22. 22.13² =
  23. 23.21² =
  24. 24.11² =
  25. 25.24² =
  26. 26.11² =
  27. 27.14² =
  28. 28.25² =
  29. 29.28² =
  30. 30.17² =
  31. 31.22² =
  32. 32.13² =
  33. 33.17² =
  34. 34.11² =
  35. 35.12² =
  36. 36.18² =
  37. 37.21² =
  38. 38.19² =
  39. 39.17² =
  40. 40.17² =

Answer key

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

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