(-7/3)-(+3.2)-(-1/6)-(-21/5)=?
问题描述:
(-7/3)-(+3.2)-(-1/6)-(-21/5)=?
答
(-7/3)-(+3.2)-(-1/6)-(-21/5)
=-7/3-16/5+1/6+21/5
=(21/5-16/5)-(7/3-1/6)
=1-13/6
=-7/6
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