(1)
2
3 +24×(
7
8 -
5
8 )
=
2
3 +24×
1
4
=
2
3 +6
=6
2
3
(2)(
1
4 +
5
6 -
1
3 )÷
1
12
=(
1
4 +
5
6 -
1
3 )×12
=
1
4 ×12+
5
6 ×12-
1
3 ×12
=3+10-4
=9
(3)
17
24 ×
3
4 +
17
24 ÷4
=
17
24 ×
3
4 +
17
24 ×
1
4
=
17
24 ×(
3
4 +
1
4 )
=
17
24
(1)
2
3 +24×(
7
8 -
5
8 )
=
2
3 +24×
1
4
=
2
3 +6
=6
2
3
(2)(
1
4 +
5
6 -
1
3 )÷
1
12
=(
1
4 +
5
6 -
1
3 )×12
=
1
4 ×12+
5
6 ×12-
1
3 ×12
=3+10-4
=9
(3)
17
24 ×
3
4 +
17
24 ÷4
=
17
24 ×
3
4 +
17
24 ×
1
4
=
17
24 ×(
3
4 +
1
4 )
=
17
24