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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 692 · 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. 1.11² =
  2. 2.21² =
  3. 3.17² =
  4. 4.14² =
  5. 5.29² =
  6. 6.25² =
  7. 7.22² =
  8. 8.27² =
  9. 9.28² =
  10. 10.19² =
  11. 11.12² =
  12. 12.26² =
  13. 13.15² =
  14. 14.23² =
  15. 15.13² =
  16. 16.13² =
  17. 17.24² =
  18. 18.16² =
  19. 19.18² =
  20. 20.29² =
  21. 21.25² =
  22. 22.11² =
  23. 23.15² =
  24. 24.16² =
  25. 25.16² =
  26. 26.28² =
  27. 27.17² =
  28. 28.15² =
  29. 29.21² =
  30. 30.19² =
  31. 31.19² =
  32. 32.26² =
  33. 33.29² =
  34. 34.25² =
  35. 35.24² =
  36. 36.14² =
  37. 37.11² =
  38. 38.25² =
  39. 39.16² =
  40. 40.15² =

Answer key

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

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