问题 解答题
脱式计算.
5400-2940÷28×27
1
4
×
3
7
+
4
7
÷4
11
18
÷[2-(
1
4
+
5
6
)]
答案

(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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