(-1又1/2)-3又1/4+(-4又1/3)-2又2/3写出具体过程
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(-1又1/2)-3又1/4+(-4又1/3)-2又2/3写出具体过程
(-1又1/2)-3又1/4+(-4又1/3)-2又2/3
写出具体过程
(-1又1/2)-3又1/4+(-4又1/3)-2又2/3写出具体过程
(-1又1/2)-3又1/4+(-4又1/3)-2又2/3
=(-1又2/4-3又1/4)+(-4又1/3-2又2/3)
=-4又3/4-7
=-11又3/4