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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 327 · 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. 2.17² =
  3. 3.22² =
  4. 4.23² =
  5. 5.16² =
  6. 6.19² =
  7. 7.29² =
  8. 8.12² =
  9. 9.13² =
  10. 10.15² =
  11. 11.28² =
  12. 12.18² =
  13. 13.24² =
  14. 14.11² =
  15. 15.14² =
  16. 16.25² =
  17. 17.21² =
  18. 18.14² =
  19. 19.16² =
  20. 20.26² =
  21. 21.26² =
  22. 22.21² =
  23. 23.24² =
  24. 24.27² =
  25. 25.23² =
  26. 26.15² =
  27. 27.16² =
  28. 28.29² =
  29. 29.28² =
  30. 30.29² =
  31. 31.26² =
  32. 32.21² =
  33. 33.24² =
  34. 34.12² =
  35. 35.24² =
  36. 36.21² =
  37. 37.13² =
  38. 38.21² =
  39. 39.12² =
  40. 40.17² =

Answer key

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

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