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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 254 · 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. 1.18² =
  2. 2.21² =
  3. 3.17² =
  4. 4.29² =
  5. 5.27² =
  6. 6.15² =
  7. 7.24² =
  8. 8.19² =
  9. 9.14² =
  10. 10.12² =
  11. 11.22² =
  12. 12.11² =
  13. 13.25² =
  14. 14.13² =
  15. 15.16² =
  16. 16.26² =
  17. 17.12² =
  18. 18.28² =
  19. 19.25² =
  20. 20.23² =
  21. 21.17² =
  22. 22.12² =
  23. 23.17² =
  24. 24.25² =
  25. 25.23² =
  26. 26.29² =
  27. 27.16² =
  28. 28.23² =
  29. 29.27² =
  30. 30.16² =
  31. 31.25² =
  32. 32.14² =
  33. 33.12² =
  34. 34.19² =
  35. 35.27² =
  36. 36.12² =
  37. 37.21² =
  38. 38.11² =
  39. 39.21² =
  40. 40.22² =

Answer key

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

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