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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 41 · 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. 1.15² =
  2. 2.26² =
  3. 3.21² =
  4. 4.14² =
  5. 5.11² =
  6. 6.16² =
  7. 7.25² =
  8. 8.12² =
  9. 9.19² =
  10. 10.17² =
  11. 11.27² =
  12. 12.28² =
  13. 13.18² =
  14. 14.24² =
  15. 15.23² =
  16. 16.29² =
  17. 17.13² =
  18. 18.22² =
  19. 19.21² =
  20. 20.26² =
  21. 21.28² =
  22. 22.21² =
  23. 23.18² =
  24. 24.22² =
  25. 25.12² =
  26. 26.14² =
  27. 27.21² =
  28. 28.21² =
  29. 29.17² =
  30. 30.11² =
  31. 31.17² =
  32. 32.21² =
  33. 33.26² =
  34. 34.14² =
  35. 35.27² =
  36. 36.21² =
  37. 37.23² =
  38. 38.13² =
  39. 39.11² =
  40. 40.25² =

Answer key

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

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