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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 412 · 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. 1.21² =
  2. 2.25² =
  3. 3.14² =
  4. 4.13² =
  5. 5.26² =
  6. 6.24² =
  7. 7.12² =
  8. 8.22² =
  9. 9.11² =
  10. 10.16² =
  11. 11.28² =
  12. 12.15² =
  13. 13.17² =
  14. 14.23² =
  15. 15.29² =
  16. 16.19² =
  17. 17.29² =
  18. 18.27² =
  19. 19.26² =
  20. 20.22² =
  21. 21.18² =
  22. 22.14² =
  23. 23.28² =
  24. 24.15² =
  25. 25.23² =
  26. 26.23² =
  27. 27.15² =
  28. 28.28² =
  29. 29.14² =
  30. 30.21² =
  31. 31.13² =
  32. 32.15² =
  33. 33.15² =
  34. 34.25² =
  35. 35.21² =
  36. 36.27² =
  37. 37.12² =
  38. 38.12² =
  39. 39.12² =
  40. 40.26² =

Answer key

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

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