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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 448 · 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. 1.17² =
  2. 2.22² =
  3. 3.18² =
  4. 4.11² =
  5. 5.21² =
  6. 6.12² =
  7. 7.26² =
  8. 8.29² =
  9. 9.15² =
  10. 10.23² =
  11. 11.25² =
  12. 12.19² =
  13. 13.28² =
  14. 14.24² =
  15. 15.14² =
  16. 16.16² =
  17. 17.27² =
  18. 18.13² =
  19. 19.29² =
  20. 20.16² =
  21. 21.11² =
  22. 22.29² =
  23. 23.15² =
  24. 24.19² =
  25. 25.15² =
  26. 26.21² =
  27. 27.14² =
  28. 28.12² =
  29. 29.26² =
  30. 30.21² =
  31. 31.29² =
  32. 32.23² =
  33. 33.12² =
  34. 34.14² =
  35. 35.27² =
  36. 36.12² =
  37. 37.24² =
  38. 38.28² =
  39. 39.15² =
  40. 40.22² =

Answer key

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

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