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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 175 · 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. 1.18² =
  2. 2.24² =
  3. 3.22² =
  4. 4.12² =
  5. 5.16² =
  6. 6.17² =
  7. 7.14² =
  8. 8.25² =
  9. 9.23² =
  10. 10.29² =
  11. 11.13² =
  12. 12.28² =
  13. 13.26² =
  14. 14.27² =
  15. 15.21² =
  16. 16.11² =
  17. 17.19² =
  18. 18.15² =
  19. 19.25² =
  20. 20.12² =
  21. 21.17² =
  22. 22.25² =
  23. 23.21² =
  24. 24.27² =
  25. 25.16² =
  26. 26.13² =
  27. 27.16² =
  28. 28.28² =
  29. 29.13² =
  30. 30.16² =
  31. 31.28² =
  32. 32.22² =
  33. 33.23² =
  34. 34.11² =
  35. 35.27² =
  36. 36.14² =
  37. 37.13² =
  38. 38.18² =
  39. 39.12² =
  40. 40.18² =

Answer key

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

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