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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 179 · 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. 1.22² =
  2. 2.19² =
  3. 3.13² =
  4. 4.18² =
  5. 5.21² =
  6. 6.15² =
  7. 7.11² =
  8. 8.28² =
  9. 9.16² =
  10. 10.24² =
  11. 11.27² =
  12. 12.25² =
  13. 13.14² =
  14. 14.23² =
  15. 15.17² =
  16. 16.12² =
  17. 17.29² =
  18. 18.19² =
  19. 19.29² =
  20. 20.26² =
  21. 21.19² =
  22. 22.15² =
  23. 23.14² =
  24. 24.15² =
  25. 25.19² =
  26. 26.13² =
  27. 27.25² =
  28. 28.25² =
  29. 29.27² =
  30. 30.24² =
  31. 31.16² =
  32. 32.24² =
  33. 33.16² =
  34. 34.17² =
  35. 35.21² =
  36. 36.15² =
  37. 37.12² =
  38. 38.14² =
  39. 39.26² =
  40. 40.19² =

Answer key

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

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