题目内容

4
5
9
×25+15
4
9
×25)÷(4
1
10
-3
9
16
)
(1
2
25
-0.28)×
5
13
+1÷(0.75+
1
3
)
6
1
4
-6.3×(6
2
5
÷6.4)÷1
4
5

11
1
9
÷(7.35-5
1
12
)+82.5×
3
5
.
①(4
5
9
×25+15
4
9
×25)÷(4
1
10
-3
9
16
),
=25×(4
5
9
+15
4
9
)÷(1
1
10
-
9
16
),
=25×20÷(
88
80
-
45
80
),
=500÷
43
80
,
=500×
80
43
,
=930
10
43
;

②(1
2
25
-0.28)×
5
13
+1÷(0.75+
1
3
),
=(
27
25
-
7
25
)×
5
13
+1÷(
9
12
+
4
12
),
=
20
25
×
5
13
+
12
13
,
=
4
13
+
12
13
,
=
16
13
,
=1
3
13
;

③6
1
4
-6.3×(6
2
5
÷6.4)÷1
4
5
,
=6
1
4
-6.3×1×
5
9
,
=6.25-3.5,
=2.75;

④11
1
9
÷(7.35-5
1
12
)+82.5×
3
5
,
=
100
9
÷(7
21
60
-5
5
60
)+49.5,
=
100
9
÷
136
60
+49.5,
=
100
9
×
15
34
+
99
2
,
=
250
51
+
99
2
,
=
500
102
+
5049
102
,
=
5549
102
,
=54
41
102
;
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