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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 581 · 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. 1.25² =
  2. 2.23² =
  3. 3.21² =
  4. 4.24² =
  5. 5.17² =
  6. 6.18² =
  7. 7.11² =
  8. 8.27² =
  9. 9.19² =
  10. 10.22² =
  11. 11.15² =
  12. 12.16² =
  13. 13.14² =
  14. 14.13² =
  15. 15.29² =
  16. 16.17² =
  17. 17.14² =
  18. 18.28² =
  19. 19.12² =
  20. 20.26² =
  21. 21.15² =
  22. 22.28² =
  23. 23.24² =
  24. 24.22² =
  25. 25.21² =
  26. 26.28² =
  27. 27.19² =
  28. 28.22² =
  29. 29.25² =
  30. 30.14² =
  31. 31.23² =
  32. 32.26² =
  33. 33.15² =
  34. 34.11² =
  35. 35.15² =
  36. 36.23² =
  37. 37.11² =
  38. 38.26² =
  39. 39.28² =
  40. 40.26² =

Answer key

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

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