你也可以把靠近等式两边(比号之间)的数值分别相乘如22.4:4=x:6就是:4*x=22.4*6x=33.6如0.6:0.36=0.8:7x 就是:0.36*0.8=0.6*7xx=12/175如x:73/4=1/5:72/5就是:73/4*1/5=x*72/5x=73/288