问题 解答题
认真计算下面各题,能简便的要简便算.
7
9
+
5
6
-
1
4
)×72  
18
23
÷
8
5
+
18
23
×
3
8
5
4
-(
3
7
+
1
4

800÷4×0.9346÷34.6%-346.
答案

(1)(

7
9
+
5
6
-
1
4
)×72,

=

7
9
×72+
5
6
×72-
1
4
×72,

=56+60-18,

98;

(2)

18
23
÷
8
5
+
18
23
×
3
8

=

18
23
×(
5
8
+
3
8
),

=

18
23

(3)

5
4
-(
3
7
+
1
4
),

=

5
4
-
3
7
-
1
4

=

4
7

(4)800÷4×0.9,

=200×0.9,

=180;

(5)346÷34.6%-346,

=346÷0.346-346,

=1000-346,

=654.

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