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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 344 · 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. 2.17² =
  3. 3.13² =
  4. 4.19² =
  5. 5.21² =
  6. 6.27² =
  7. 7.24² =
  8. 8.28² =
  9. 9.12² =
  10. 10.26² =
  11. 11.18² =
  12. 12.15² =
  13. 13.23² =
  14. 14.11² =
  15. 15.22² =
  16. 16.16² =
  17. 17.29² =
  18. 18.14² =
  19. 19.12² =
  20. 20.25² =
  21. 21.15² =
  22. 22.19² =
  23. 23.14² =
  24. 24.22² =
  25. 25.28² =
  26. 26.15² =
  27. 27.22² =
  28. 28.27² =
  29. 29.12² =
  30. 30.14² =
  31. 31.22² =
  32. 32.18² =
  33. 33.14² =
  34. 34.19² =
  35. 35.11² =
  36. 36.11² =
  37. 37.27² =
  38. 38.29² =
  39. 39.27² =
  40. 40.26² =

Answer key

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

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