提示:要先求出药粉与药液的质量比哟!
8.1÷0.27=
-×=
3.98+0.2=
0.23=
41-2.9-1.1=
502×39≈
10-0.09=
×÷×=
0.8×5= 3.6+1.4= = =
= 0×75%= 4.8÷24= 90×30%=