12.4 / 2.5 +7.2=4.96 +7.2=12.16
12.4 ÷2.5 +7.2=4.96+7.2=12.16和是12.16
一、7.28+3.2/2.5=7.28+1.28=8.56 二、(253+194.3)/(4.6一:7.28加上3.2除以2.5的商,和是多少? 7.28+(3.2÷2.5) =7