You've got 12 pieces of exercise books! These are typically notebooks commonly used for schoolwork, note-taking, or practicing skills like handwriting or drawing. Here's a breakdown of what 12 exercise books could mean:

Quantity:

• Dozen: "12 pieces" is a common way to say a dozen exercise books.

Possible Types:

• Subjects: The exercise books could be dedicated to specific subjects like math, science, history, or language learning.
• Ruling: They might have different ruling styles like wide-ruled for younger students, college-ruled for general use, or even graph-ruled for math or science.
• Size: Exercise books come in various sizes, with A4 being a common choice.

Uses:

• Schoolwork: These notebooks are ideal for students to take notes in class, complete assignments, or practice problems.
• Organization: They can be used for personal organization, keeping track of ideas, or creating to-do lists.
• Creative Activities: They can be used for sketching, drawing, or practicing handwriting.

Additional Information Needed (Optional):

• To get a clearer picture, it would be helpful to know:
  • Are there any markings or labels on the exercise books that indicate a specific subject or grade level?
  • Is there a particular size or ruling style?

If you can provide more details, I can help you narrow down the specific type of exercise books you have.