题目内容

脱式计算.
5400-2940÷28×27
1
4
×
3
7
+
4
7
÷4
11
18
÷[2-(
1
4
+
5
6
)]
(1)5400-2940÷28×27,
=5400-105×27,
=5400-2835,
=2565;

(2)
1
4
×
3
7
+
4
7
÷4,
=
1
4
×
3
7
+
4
7
×
1
4

=
1
4
×(
3
7
+
4
7
),
=
1
4


(3)
11
18
÷[2-(
1
4
+
5
6
)],
=
11
18
÷[2-
13
12
],
=
11
18
÷
11
12

=
2
3
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