-1.53*(-4/9)-9.47*(-4/9)-2*4/9
问题描述：
-1.53*(-4/9)-9.47*(-4/9)-2*4/9
答
-1.53*(-4/9)-9.47*(-4/9)-2*4/9
=(4/9)[(-1.53)(-1)+(-9.47)(-1)-2]
=(4/9)[1.53+9.47-2]
=(4/9)*9
=4