1 1 9 9 =10.在当中加入合适的运算符号加,减.乘,除和括号

问题描述:

1 1 9 9 =10.在当中加入合适的运算符号加,减.乘,除和括号

(1+1/9)*9=10
(-1-1/9)*(-9)=10

(1 +1/9 ) * (9) = 10

(-1 - 1/9 ) * (-9) = 10

( -1 - 1/9 ) * (-9) = 10