(-13/4)+[5/7+(0.75)]+(-12/7)=?有4个选项:-4、-4.5、-5、-3.5
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(-13/4)+[5/7+(0.75)]+(-12/7)=?有4个选项:-4、-4.5、-5、-3.5
(-13/4)+[5/7+(0.75)]+(-12/7)=?
有4个选项:-4、-4.5、-5、-3.5
(-13/4)+[5/7+(0.75)]+(-12/7)=?有4个选项:-4、-4.5、-5、-3.5
(-13/4)+[5/7+(0.75)]+(-12/7)
=-13/4+5/7+3/4-12/7
=-13/4+3/4+5/7-12/7
=-10/4-1
=-14/4
=-7/2
=-3.5 \
给分哇、
不容易哇、
(-13/4)+[5/7+(0.75)]+(-12/7)
=-13/4+5/7+3/4-12/7
=(-13+3)/4+(5-12)/7
=-5/2-7/7
=-2.5-1=-3.5
(-13/4)+[5/7+(0.75)]+(-12/7)
=-13/4+5/7+3/4-12/7
=-13/4+3/4+5/7-12/7
=-10/4-1
=-14/4
=-7/2
=-3.5
1.5