Question

简便运算：（-2又3/5)+（+3又1/4)+(-3又2/5)+(+2又3/4)+(-1又1/2)+(-1又1/3)

Answer 1

（-2又3/5)+（+3又1/4)+(-3又2/5)+(+2又3/4)+(-1又1/2)+(-1又1/3)
=（3又1/4+2又3/4）-（2又3/5+3又2/5）-1又1/2-1又1/3
=6-6-1又3/6-1又2/6
=-2又5/6

Answer 2

（-2又3/5)+（+3又1/4)+(-3又2/5)+(+2又3/4)+(-1又1/2)+(-1又1/3)
= -2+3-3+2-1-1-3/5+1/4-2/5+3/4-1/2-1/3
=-2又5/6

Answer 3

-2又2/3

追问

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