题目内容

用自己喜欢的方法计算:
5
7
5
6
2
7
1
6
5
6
5
8
)×
24
25
81×
79
80
3
5
1
2
×
4
5
2-
6
13
÷
9
26
-
2
3
[1-(
1
4
3
8
)]÷
1
4

(1)
5
7
+
5
6
+
2
7
+
1
6

=(
5
7
+
2
7
)+(
5
6
+
1
6
),
=1+1,
=2;

(2)(
5
6
+
5
8
)×
24
25

=
5
6
×
24
25
+
5
8
×
24
25

=
4
5
+
3
5

=
7
5


(3)81×
79
80

=(80+1)×
79
80

=80×
79
80
+1×
79
80

=79+
79
80

=79
79
80


(4)
3
5
+
1
2
×
4
5

=
3
5
+
2
5

=1;

(5)2-
6
13
÷
9
26
-
2
3

=2-
4
3
-
2
3

=2-(
4
3
+
2
3
),
=2-2,
=0;

(6)[1-(
1
4
+
3
8
)]÷
1
4

=[1-
5
8
1
4

=
3
8
÷
1
4

=
3
2
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