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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 433 · 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. 2.16² =
  3. 3.14² =
  4. 4.23² =
  5. 5.12² =
  6. 6.28² =
  7. 7.22² =
  8. 8.15² =
  9. 9.18² =
  10. 10.19² =
  11. 11.25² =
  12. 12.11² =
  13. 13.26² =
  14. 14.17² =
  15. 15.13² =
  16. 16.27² =
  17. 17.29² =
  18. 18.14² =
  19. 19.26² =
  20. 20.24² =
  21. 21.12² =
  22. 22.25² =
  23. 23.26² =
  24. 24.22² =
  25. 25.26² =
  26. 26.16² =
  27. 27.26² =
  28. 28.26² =
  29. 29.27² =
  30. 30.27² =
  31. 31.15² =
  32. 32.27² =
  33. 33.14² =
  34. 34.21² =
  35. 35.29² =
  36. 36.16² =
  37. 37.11² =
  38. 38.21² =
  39. 39.26² =
  40. 40.14² =

Answer key

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

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