Question

1.8乘百分之40加上五分之二除于二分之一2.4点15减3点75乘百分之10减八分之五.[急.]

Answer 1

1.8*40%+2/5 /1/2

=8*04+2/5*2

=3.2+0.8

=4

2.4.15-3.75*10%-5/8

=4.15-0.375-0.625

=4.15-(0.375+0.625)

=4.15-1

=3.15

3.1-39%*1/2 /0.195

=1-0.39*0.5/0.195

=1-0.195/0.195

=1-1

=0