问题 解答题
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
答案

(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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