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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 744 · 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. 1.26² =
  2. 2.13² =
  3. 3.14² =
  4. 4.23² =
  5. 5.11² =
  6. 6.25² =
  7. 7.15² =
  8. 8.29² =
  9. 9.22² =
  10. 10.24² =
  11. 11.21² =
  12. 12.17² =
  13. 13.27² =
  14. 14.12² =
  15. 15.18² =
  16. 16.28² =
  17. 17.19² =
  18. 18.16² =
  19. 19.27² =
  20. 20.26² =
  21. 21.11² =
  22. 22.25² =
  23. 23.21² =
  24. 24.11² =
  25. 25.26² =
  26. 26.21² =
  27. 27.15² =
  28. 28.11² =
  29. 29.17² =
  30. 30.12² =
  31. 31.19² =
  32. 32.29² =
  33. 33.12² =
  34. 34.26² =
  35. 35.21² =
  36. 36.14² =
  37. 37.29² =
  38. 38.23² =
  39. 39.16² =
  40. 40.27² =

Answer key

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

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