a=3,b=-5,c=-7,求a-b-c的值
问题描述:
a=3,b=-5,c=-7,求a-b-c的值
答
a-b-c
=3-(-5)-(-7)
=3+5+7
=15
a=3,b=-5,c=-7,求a-b-c的值
a-b-c
=3-(-5)-(-7)
=3+5+7
=15