算术符号是谁创造的“+”、“-”号是15世纪德国数学家魏德美创造的。在横线上加一竖,表示增加。从加号中减去一竖,表示减少。“×”号是18世纪美国数学家欧德莱最先使用的。意思是表示增加的另一种方法,因此把加号斜过来写。“+”号是18世纪瑞士人哈纳创造的。用一条横线把两个圆点分开,表示分解的意思。“=”号是16世纪英国学者列科儿德创造的。他认为世界上再没有比这两条平行而又相等的直线更 Arithmetic symbols who created the “+”, “-” number is the 15th century German mathematician Wei Demei created. Add a vertical line, said the increase. Subtract vertical from the plus sign, indicating a decrease. The “x” sign was first used by the American mathematician Oddley in the 18th century. Meaning means another way of adding, so write the plus sign. The + sign was created by Hana in the 18th century. Use a horizontal line to separate the two dots, indicating the meaning of decomposition. The symbol “=” was created by Le Corbusier, a 16th-century British scholar. He thinks there is no more straight line in the world that is parallel and equal to the two