Middle school students generally use 24K, 16K exercise books.
16 opening paper is the paper originally used for documents in the government and institutions, and can also be used as printing paper. The size is magnanimous: 210mm× 285mm; Correctness: 185mm×260mm.
8 Introduction:
The normal 8-seam size is: 270mm×390 mm for white material and 260mm×370 mm for finished product. The size of the page is called folio, and folio is based on the whole paper. How many small pieces of paper are cut into a pair on each whole piece of paper?
In China, it is customary to use geometric series to name folio. The size of the folded paper is folio, then folded into 4 sheets, then folded into 8 sheets, then folded into 16 sheets, then folded into 32 sheets, then folded into 64 sheets, and so on.