(1)(120×20%+56)÷
4
5 ,
=(24+56)÷
4
5 ,
=80÷
4
5 ,
=100;
答:这个数是100.
(2)(7.5×
1
3 -1
1
2 )÷
4
5 ,
=(2
1
2 -1
1
2 )÷
4
5 ,
=1÷
4
5 ,
=
5
4 ;
答:商是
5
4 .
(1)(120×20%+56)÷
4
5 ,
=(24+56)÷
4
5 ,
=80÷
4
5 ,
=100;
答:这个数是100.
(2)(7.5×
1
3 -1
1
2 )÷
4
5 ,
=(2
1
2 -1
1
2 )÷
4
5 ,
=1÷
4
5 ,
=
5
4 ;
答:商是
5
4 .