(1)
14
5 ÷
7
2 ×
1
4 ,
=
4
5 ×
1
4 ,
=
1
5 ;
答:是
1
5 .
(2)设这个数是x,由题意得:
75%x+75×4=156,
75%x+300=156,
0.75x=-144,
x=-192;
答:这个数是192.
(1)
14
5 ÷
7
2 ×
1
4 ,
=
4
5 ×
1
4 ,
=
1
5 ;
答:是
1
5 .
(2)设这个数是x,由题意得:
75%x+75×4=156,
75%x+300=156,
0.75x=-144,
x=-192;
答:这个数是192.