60-(?-17.3)=53.6
问题描述:
60-(?-17.3)=53.6
例题 60-?-17.3=19
60 =19+17.3
60-?=36.3
=60-36.3
=23.7
急
答
60-(?-17.3)=53.6
60-?+17.3=53.6
60 =53.6-17.3
60-?=36.3
=60-36.3
=23.7