问题 解答题
4.44÷
37
8
+
31
37
÷
25
111
+
35
37
×
111
25

67×
65
66
+
1
66

91×
1
13
+9÷13-1÷13×100
3
4
+
3
28
+
3
70
+
3
130
+
3
208
答案

(1)4.44÷

37
8
+
31
37
÷
25
111
+
35
37
×
111
25

=

111
25
×
8
37
+
31
37
×
111
25
+
35
37
×
111
25

=

111
25
×
8
37
+(
31
37
+
35
37
)×
111
25

=

111
25
×
8
37
+
66
37
×
111
25

=

111
25
×(
8
37
+
66
37
),

=

111
25
×2,

=

222
25

(2)67×

65
66
+
1
66

=(66+1)×

65
66
+
1
66

=65+

65
66
+
1
66

=65+1,

=66;

(3)91×

1
13
+9÷13-1÷13×100,

=91×

1
13
+
9
13
-
1
13
×100,

=91×

1
13
+
1
13
×9-
1
13
×100,

=(91+9-100)×

1
13

=0×

1
13

=0;

(4)

3
4
+
3
28
+
3
70
+
3
130
+
3
208

=

3
1×4
+
3
4×7
+
3
7×10
+
3
10×13
+
1
13×16

=1-

1
4
+
1
4
-
1
7
+
1
7
-
1
10
+
1
10
-
1
13
+
1
13
-
1
16

=1-

1
16

=

15
16

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