题目内容

脱式计算:
(1)(
3
4
+
5
6
-
2
3
)×24
(2)(
5
6
+
7
12
+
3
8
)÷
1
48

(3)(
1
3
-
1
6
)×(
5
8
÷
1
6

(4)
4
9
÷[
4
5
-(
1
3
-
1
5
)].
(1)(
3
4
+
5
6
-
2
3
)×24
=
3
4
×
24+
5
6
×
24-
2
3
×
24,
=18+20-16,
=22;

(2)(
5
6
+
7
12
+
3
8
)÷
1
48

=(
5
6
+
7
12
+
3
8
)×48,
=
5
6
×
48+
7
12
×48+
3
8
×48,
=40+28+18,
=86;

(3)(
1
3
-
1
6
)×(
5
8
÷
1
6

=(
2
6
-
1
6
)×(
5
8
×6
),
=
1
6
×
15
4

=
5
8


(4)
4
9
÷[
4
5
-(
1
3
-
1
5
)]
=
4
9
÷[
4
5
-
5
15
-
3
15
)],
=
4
9
÷[
4
5
-
2
15
],
=
4
9
÷[
12
15
-
2
15
],
=
4
9
×
3
2

=
2
3
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