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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 245 · 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. 1.11² =
  2. 2.14² =
  3. 3.21² =
  4. 4.19² =
  5. 5.12² =
  6. 6.26² =
  7. 7.16² =
  8. 8.15² =
  9. 9.17² =
  10. 10.29² =
  11. 11.23² =
  12. 12.27² =
  13. 13.13² =
  14. 14.24² =
  15. 15.18² =
  16. 16.22² =
  17. 17.25² =
  18. 18.16² =
  19. 19.28² =
  20. 20.15² =
  21. 21.12² =
  22. 22.21² =
  23. 23.23² =
  24. 24.11² =
  25. 25.15² =
  26. 26.14² =
  27. 27.19² =
  28. 28.24² =
  29. 29.23² =
  30. 30.29² =
  31. 31.13² =
  32. 32.14² =
  33. 33.13² =
  34. 34.16² =
  35. 35.18² =
  36. 36.11² =
  37. 37.27² =
  38. 38.15² =
  39. 39.26² =
  40. 40.24² =

Answer key

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

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