题目内容

240÷600×100%=
7
8
×
5
7
+
3
8
=
1
3
÷
3
5
÷5=
12×(
2
3
+
1
4
)=
(
11
13
-
11
13
)÷
1
11
=
4
5
+
1
5
÷
4
5
+
1
5
=
(1)240÷600×100%,
=0.4×100%,
=0.4;

(2)
7
8
×
5
7
+
3
8
,
=
5
8
+
3
8
,
=1;

(3)
1
3
÷
3
5
÷5,
=
5
9
×
1
5
,
=
1
9
;

(4)12×(
2
3
+
1
4
),
=12×
2
3
+12×
1
4
,
=8+3,
=11;

(5)(
11
13
-
11
13
)÷
1
11
.
=0÷
1
11
,
=0;

(6)
4
5
+
1
5
÷
4
5
+
1
5
,
=
4
5
+
1
4
+
1
5
,
=
4
5
+
1
5
+
1
4
,
=1
1
4
.
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