2.5×+5.7=6.2解:2.5×=6.2-5.7→左边是正移动到右边是负×=0.5÷2.5×=0.2检验:2.5×0.2+5.7=0.5+5.7=6.2
化为2.5x=6.2-5.72.5x=0.5x=0.2
2.5 X(6+x) =27.5
