题目内容

计算:
2
9
+
1
8
÷
4
5
+
5
8
5
9
+
5
6
-
1
4
)×72
8
11
÷
8
5
+
3
8
×
8
11
(1)
2
9
+
1
8
÷
4
5
+
5
8

=
2
9
+
1
8
×
5
4
+
5
8

=
2
9
+
5
32
+
5
8

=
64
288
+
45
288
+
180
288

=
289
288


(2)(
5
9
+
5
6
-
1
4
)×72,
=
5
9
×72+
5
6
×72-
1
4
×72,
=40+60-18,
=82;

(3)
8
11
÷
8
5
+
3
8
×
8
11

=
8
11
×
5
8
+
3
8
×
8
11

=(
5
8
+
3
8
)×
8
11

=1×
8
11

=
8
11
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