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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 585 · 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. 1.24² =
  2. 2.16² =
  3. 3.21² =
  4. 4.15² =
  5. 5.22² =
  6. 6.11² =
  7. 7.19² =
  8. 8.12² =
  9. 9.14² =
  10. 10.18² =
  11. 11.25² =
  12. 12.29² =
  13. 13.28² =
  14. 14.17² =
  15. 15.23² =
  16. 16.13² =
  17. 17.11² =
  18. 18.13² =
  19. 19.26² =
  20. 20.23² =
  21. 21.28² =
  22. 22.27² =
  23. 23.14² =
  24. 24.25² =
  25. 25.14² =
  26. 26.23² =
  27. 27.21² =
  28. 28.17² =
  29. 29.23² =
  30. 30.21² =
  31. 31.14² =
  32. 32.27² =
  33. 33.15² =
  34. 34.19² =
  35. 35.23² =
  36. 36.14² =
  37. 37.29² =
  38. 38.16² =
  39. 39.16² =
  40. 40.12² =

Answer key

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

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