(1)27.5+21÷14×7,
=27.5+10.5,
=38;
(2)234×99-766,
=234×100-(234+766),
=23400-1000,
=22400;
(3)
4
3 ×
8
5 -
3
5 ×
4
3 ,
=(
8
5 -
3
5 )×
4
3 ,
=1×
4
3 ,
=
4
3 ;
(4)(0.4+
1
3 )÷
22
5 +
3
4 ,
=(
2
5 +
1
3 ) ÷
22
5 +
3
4 ,
=
11
15 ×
5
22 +
3
4 ,
=
1
6 +
3
4 ,
=
11
12 ;
(5)[6+
1
2 ×(
5
12 -
3
8 )]×
5
3 ,
=[6+
1
2 ×
1
24 ]×
5
3 ,
=
289
48 ×
5
3 ,
=
1445
144 .