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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 308 · 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. 2.21² =
  3. 3.11² =
  4. 4.16² =
  5. 5.18² =
  6. 6.19² =
  7. 7.28² =
  8. 8.22² =
  9. 9.24² =
  10. 10.13² =
  11. 11.17² =
  12. 12.12² =
  13. 13.27² =
  14. 14.14² =
  15. 15.25² =
  16. 16.12² =
  17. 17.23² =
  18. 18.26² =
  19. 19.29² =
  20. 20.26² =
  21. 21.14² =
  22. 22.25² =
  23. 23.12² =
  24. 24.12² =
  25. 25.27² =
  26. 26.23² =
  27. 27.16² =
  28. 28.23² =
  29. 29.26² =
  30. 30.27² =
  31. 31.11² =
  32. 32.14² =
  33. 33.11² =
  34. 34.22² =
  35. 35.18² =
  36. 36.26² =
  37. 37.27² =
  38. 38.14² =
  39. 39.28² =
  40. 40.24² =

Answer key

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

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