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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 682 · 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. 1.29² =
  2. 2.17² =
  3. 3.18² =
  4. 4.25² =
  5. 5.16² =
  6. 6.24² =
  7. 7.12² =
  8. 8.11² =
  9. 9.13² =
  10. 10.28² =
  11. 11.21² =
  12. 12.19² =
  13. 13.26² =
  14. 14.14² =
  15. 15.23² =
  16. 16.27² =
  17. 17.21² =
  18. 18.22² =
  19. 19.15² =
  20. 20.16² =
  21. 21.28² =
  22. 22.15² =
  23. 23.24² =
  24. 24.16² =
  25. 25.29² =
  26. 26.21² =
  27. 27.19² =
  28. 28.12² =
  29. 29.14² =
  30. 30.29² =
  31. 31.16² =
  32. 32.13² =
  33. 33.13² =
  34. 34.23² =
  35. 35.11² =
  36. 36.18² =
  37. 37.17² =
  38. 38.26² =
  39. 39.12² =
  40. 40.22² =

Answer key

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

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