(-9)-(-2)+(-7)-(+5)-(-4)写成省略加号形式到底该怎样写
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(-9)-(-2)+(-7)-(+5)-(-4)写成省略加号形式到底该怎样写(-9)-(-2)+(-7)-(+5)-(-4)写成省略加号形式到底该怎样写(-9)-(-2)+(-7)-(+5)-(-4)
(-9)-(-2)+(-7)-(+5)-(-4)写成省略加号形式到底该怎样写
(-9)-(-2)+(-7)-(+5)-(-4)写成省略加号形式
到底该怎样写
(-9)-(-2)+(-7)-(+5)-(-4)写成省略加号形式到底该怎样写
(-9)-(-2)+(-7)-(+5)-(-4)
=-9+2-7-5+4
(-9)-(-2)-7-5-(-4)