(+1/4)-[(-3)+(+1/4)写成省略加号和括号的形式

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(+1/4)-[(-3)+(+1/4)写成省略加号和括号的形式

(+1/4)-[(-3)+(+1/4)
=1/4+3-1/4
=3

(+1/4)-[(-3)+(+1/4)]
=1/4+3-1/4
=3

(+1/4)-[(-3)+(+1/4)写成省略加号和括号的形式
=1/4-(-3)+1/4