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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 881 · 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. 1.13² =
  2. 2.24² =
  3. 3.21² =
  4. 4.22² =
  5. 5.23² =
  6. 6.25² =
  7. 7.17² =
  8. 8.26² =
  9. 9.19² =
  10. 10.12² =
  11. 11.11² =
  12. 12.16² =
  13. 13.22² =
  14. 14.27² =
  15. 15.18² =
  16. 16.14² =
  17. 17.29² =
  18. 18.28² =
  19. 19.14² =
  20. 20.12² =
  21. 21.18² =
  22. 22.28² =
  23. 23.15² =
  24. 24.21² =
  25. 25.24² =
  26. 26.16² =
  27. 27.11² =
  28. 28.28² =
  29. 29.14² =
  30. 30.25² =
  31. 31.25² =
  32. 32.21² =
  33. 33.17² =
  34. 34.23² =
  35. 35.17² =
  36. 36.14² =
  37. 37.15² =
  38. 38.28² =
  39. 39.14² =
  40. 40.16² =

Answer key

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

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