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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 406 · 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. 2.14² =
  3. 3.11² =
  4. 4.23² =
  5. 5.28² =
  6. 6.25² =
  7. 7.24² =
  8. 8.26² =
  9. 9.18² =
  10. 10.21² =
  11. 11.13² =
  12. 12.15² =
  13. 13.27² =
  14. 14.16² =
  15. 15.19² =
  16. 16.22² =
  17. 17.17² =
  18. 18.12² =
  19. 19.27² =
  20. 20.14² =
  21. 21.12² =
  22. 22.21² =
  23. 23.21² =
  24. 24.23² =
  25. 25.12² =
  26. 26.27² =
  27. 27.14² =
  28. 28.21² =
  29. 29.19² =
  30. 30.21² =
  31. 31.11² =
  32. 32.11² =
  33. 33.18² =
  34. 34.21² =
  35. 35.21² =
  36. 36.15² =
  37. 37.21² =
  38. 38.29² =
  39. 39.18² =
  40. 40.11² =

Answer key

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

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