Question

已知m加3的绝对值加n减5的绝对值等于0,则m加n减3的值是多少?

Answer 1

|m+3|+|n-5|=0

|m+3|>=0 |n-5|>=0

所以|m+3|=0 |n-5|=0

m=-3 n=5

m+n-3=-3+5-3=-1

m+n-3=-1