At the same time, because there are various versions of math books, A4 copy paper can be used as a reference to calculate the weight of math textbooks.
The size of A4 copy paper is 21* 29.7cm (210mm× 297mm), and the size of an A4 copy paper is 0.210mm * 0.297mm = 0.06237m2, and 70g of A4 paper weighs 70g per square meter.
People's Republic of China (PRC) national standard GB/T 148- 1997 "Paper size for printing, writing and drawing" is not equivalent to ISO2 16: 1975.
Extended data:
1, Mathematics Enlightenment Book: Children's Mathematics 1?
Format: 16
Pages: 132 pages
16 size A4 paper is 21* 29.7cm (210mm× 297mm), which can refer to the weight of a single A4 paper of 4.366g..
So the weight of this math book is 132 * 4.366 = 576.338+02g.
2. Math III-Simplified solution of objective math problems for postgraduate entrance examination
Format: 16
Number of pages: 322 pages
16 size A4 paper is 21* 29.7cm (210mm× 297mm), which can refer to the weight of a single A4 paper of 4.366g..
So the weight of this math book is 322*4.366= 1405.852 grams.
Baidu encyclopedia -A4 paper
China book network-mathematics enlightenment reading: children's mathematics 1
China Book Network -20 16- Mathematics III-Simplified Solution to the Objective Problems of Postgraduate Mathematics