小学数学备课参考资料（二）王文林第三册数学符号的来源数学中有许多符号，除了数的符号外，还有运算符号，括号；图形中的点用大写字母Ａ、Ｂ、Ｃ、Ｄ、……等表示；线段用ＡＢ、ＢＣ……等；表示数还用小写字母ａ、ｂ、ｃ……等，这些符号似乎很苦燥乏味，但它们却是世... Primary school mathematics lesson reference materials (two) Wang Wenlin third source of mathematical symbols There are many symbols in mathematics, in addition to the number of symbols, there are arithmetic symbols, brackets; graphics point with capital letters A, B, C, D, ... ... and so on; line with AB, BC ...... and so on; said the number also use lowercase letters a, b, c ...... and so on, these symbols seem very boring, but they are the world ...