问题 解答题
计算下面各题,能简算的要简算.
8
13
÷7+
1
7
×
6
13
11
13
÷[(
5
8
+
3
4
)÷
5
8
]
101×
99
102
23×
14
39
+14×
16
39
答案

(1)

8
13
÷7+
1
7
×
6
13

=

8
13
×
1
7
+
1
7
×
6
13

=(

8
13
+
6
13
)×
1
7

=

14
13
×
1
7

=

2
13

(2)

11
13
÷[(
5
8
+
3
4
)÷
5
8
],

=

11
13
÷[
11
8
÷
5
8
],

=

11
13
÷
11
5

=

5
13

(3)101×

99
102

=(102-1)×

99
102

=102×

99
102
-1×
99
102

=99-

99
102

=98

1
34

(4)23×

14
39
+14×
16
39

=23×

14
39
+16×
14
39

=(23+16)×

14
39

=39×

14
39

=14.

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