-2(+7/12)+(-7/15)-(-1/3)+(-1又1/6)= (-47/8)-(5又1/5)+(4又1/4)-(+3又1/8)= (-1)+(+2)-(-3)-(-4)=
(-3又1/3)-(+1/2)+(4又3/4)-(-1又2/3)=要过程拜托拜托-2(+7/12)+(-7/15)-(-1/3)+(-1又1/6)=(-47/8)-(5又...
(-3又1/3)-(+1/2)+(4又3/4)-(-1又2/3)= 要过程拜托拜托
-2(+7/12)+(-7/15)-(-1/3)+(-1又1/6)=
(-47/8)-(5又1/5)+(4又1/4)-(+3又1/8)=
(-1)+(+2)-(-3)-(-4)= 展开
-2(+7/12)+(-7/15)-(-1/3)+(-1又1/6)=
(-47/8)-(5又1/5)+(4又1/4)-(+3又1/8)=
(-1)+(+2)-(-3)-(-4)= 展开
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