(1)270÷45×32
=6×32
=192;
(2)8×
1
12 +
2
5 ÷4
=
2
3 +
2
5 ×
1
4
=
2
3 +
1
10
=
23
30 ;
(3)1÷(
13
4 -
1
4 ÷
3
5 )
=1÷(
13
4 -
1
4 ×
5
3 )
=1÷(
13
4 -
5
12 )
=1×
6
17
=
6
17 ;
(4)1.75×0.8+9.2×1.75
=(0.8+9.2)×1.75
=10×1.75
=17.5.
(1)270÷45×32
=6×32
=192;
(2)8×
1
12 +
2
5 ÷4
=
2
3 +
2
5 ×
1
4
=
2
3 +
1
10
=
23
30 ;
(3)1÷(
13
4 -
1
4 ÷
3
5 )
=1÷(
13
4 -
1
4 ×
5
3 )
=1÷(
13
4 -
5
12 )
=1×
6
17
=
6
17 ;
(4)1.75×0.8+9.2×1.75
=(0.8+9.2)×1.75
=10×1.75
=17.5.