新运算a★b=a-b+1,计算(2★3)★2的值是多少,0 B.-1 C.-2 D.1

问题描述:

新运算a★b=a-b+1,计算(2★3)★2的值是多少,0 B.-1 C.-2 D.1

答案B (2★3)★2=(2★3)-2+1=2-3+1-1=-1