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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 404 · 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. 2.13² =
  3. 3.24² =
  4. 4.21² =
  5. 5.15² =
  6. 6.19² =
  7. 7.22² =
  8. 8.26² =
  9. 9.27² =
  10. 10.16² =
  11. 11.14² =
  12. 12.25² =
  13. 13.23² =
  14. 14.21² =
  15. 15.12² =
  16. 16.24² =
  17. 17.18² =
  18. 18.11² =
  19. 19.28² =
  20. 20.29² =
  21. 21.17² =
  22. 22.19² =
  23. 23.15² =
  24. 24.16² =
  25. 25.12² =
  26. 26.19² =
  27. 27.23² =
  28. 28.24² =
  29. 29.12² =
  30. 30.24² =
  31. 31.11² =
  32. 32.22² =
  33. 33.26² =
  34. 34.26² =
  35. 35.17² =
  36. 36.24² =
  37. 37.14² =
  38. 38.19² =
  39. 39.23² =
  40. 40.17² =

Answer key

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

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