8.1÷0.03=
0.375×16=
X-80%X=0.4
X+ =
X+ 25%X=25
②算术方法解:
1+0.09= 12.5×0.8= 80﹣80%= 0.43=
= 505÷10.1= = 48÷32=
÷3= 1+40%=
:8= 0.62= 0.8×0.25= 10-0.01= ( )×0.4=1