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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 884 · 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. 2.16² =
  3. 3.27² =
  4. 4.19² =
  5. 5.21² =
  6. 6.23² =
  7. 7.11² =
  8. 8.12² =
  9. 9.18² =
  10. 10.22² =
  11. 11.28² =
  12. 12.25² =
  13. 13.14² =
  14. 14.24² =
  15. 15.11² =
  16. 16.26² =
  17. 17.17² =
  18. 18.13² =
  19. 19.26² =
  20. 20.29² =
  21. 21.21² =
  22. 22.11² =
  23. 23.14² =
  24. 24.11² =
  25. 25.19² =
  26. 26.16² =
  27. 27.23² =
  28. 28.29² =
  29. 29.26² =
  30. 30.29² =
  31. 31.24² =
  32. 32.12² =
  33. 33.17² =
  34. 34.25² =
  35. 35.12² =
  36. 36.13² =
  37. 37.24² =
  38. 38.26² =
  39. 39.22² =
  40. 40.17² =

Answer key

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

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