(1)3-0.5×2,
=3-1,
=2;
(2)
4
5 +
1
3 -
1
15 ,
=
17
15 -
1
15 ,
=
16
15 ;
(3)
3
4 ÷(
1
2 -
3
8 ),
=
3
4 ÷
1
8 ,
=6;
(4)26.4÷(2.5×3-1.5),
=26.4÷(7.5-1.5),
=26.4÷6,
=4.4;
(5)(4.4-1.8)×(0.4+2),
=2.6×2.4,
=6.24;
(6)2-
5
4 ×
8
15 -
1
3 ,
=2-
2
3 -
1
3 ,
=2-(
2
3 +
1
3 ),
=2-1,
=1;
(7)[1-(
1
6 +
1
4 )]÷
7
10 ,
=[1-
5
12 ]÷
7
10 ,
=
7
12 ×
10
7 ,
=
5
6 .