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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 854 · 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. 2.14² =
  3. 3.15² =
  4. 4.16² =
  5. 5.12² =
  6. 6.11² =
  7. 7.18² =
  8. 8.29² =
  9. 9.23² =
  10. 10.24² =
  11. 11.26² =
  12. 12.21² =
  13. 13.13² =
  14. 14.19² =
  15. 15.25² =
  16. 16.17² =
  17. 17.28² =
  18. 18.22² =
  19. 19.13² =
  20. 20.29² =
  21. 21.22² =
  22. 22.11² =
  23. 23.25² =
  24. 24.14² =
  25. 25.13² =
  26. 26.17² =
  27. 27.29² =
  28. 28.12² =
  29. 29.14² =
  30. 30.12² =
  31. 31.12² =
  32. 32.12² =
  33. 33.16² =
  34. 34.25² =
  35. 35.25² =
  36. 36.21² =
  37. 37.23² =
  38. 38.11² =
  39. 39.11² =
  40. 40.23² =

Answer key

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

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