1.95×（18.21+9.19）÷0.3

1.95×（18.21+9.19）÷0.3
=1.95×（18.21+9.19）÷0.3
=6.5×9.02
=6.5*9+6.5*0.02
=58.5+0.13

=58.63

原式=1.95÷0.3×〔18＋0.21＋9+0.19〕
=6.5×〔27＋0.4〕
=6.5×27＋6.5×0.4
=175.5+2.6
=178.1

现在小孩都真懒!
学长门失望ing~

53.43