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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 867 · 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. 2.24² =
  3. 3.27² =
  4. 4.28² =
  5. 5.21² =
  6. 6.11² =
  7. 7.12² =
  8. 8.14² =
  9. 9.23² =
  10. 10.18² =
  11. 11.22² =
  12. 12.26² =
  13. 13.15² =
  14. 14.29² =
  15. 15.17² =
  16. 16.13² =
  17. 17.25² =
  18. 18.17² =
  19. 19.19² =
  20. 20.27² =
  21. 21.12² =
  22. 22.23² =
  23. 23.22² =
  24. 24.28² =
  25. 25.21² =
  26. 26.28² =
  27. 27.16² =
  28. 28.16² =
  29. 29.11² =
  30. 30.16² =
  31. 31.15² =
  32. 32.21² =
  33. 33.15² =
  34. 34.23² =
  35. 35.22² =
  36. 36.17² =
  37. 37.15² =
  38. 38.17² =
  39. 39.12² =
  40. 40.23² =

Answer key

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

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