早教吧 育儿知识 作业答案 考试题库 百科 知识分享

7.4×25%-3.4×25%207×23+17÷32(58╳715+16)╳1113÷(12╳23+15)(18+16+12)╳481-36÷94╳38.

题目详情
7.4×25%-3.4×25%
20
7
×
2
3
+
1
7
÷
3
2
5
8
7
15
+
1
6
)╳
1
11
3÷(
1
2
2
3
+
1
5
1
8
+
1
6
+
1
2
)╳48
1-36÷
9
4
3
8
▼优质解答
答案和解析
(1)7.4×25%-3.4×25%,
=(7.4-3.4)×25%,
=4×25%,
=1;

(2)
20
7
×
2
3
+
1
7
÷
3
2

=
20
7
×
2
3
+
1
7
×
2
3

=(
20
7
+
1
7
)×
2
3

=3×
2
3

=2;

(3)(
5
8
×
7
15
+
1
6
)×
1
11

=(
7
24
+
1
6
)×
1
11

=
11
24
×
1
11

=
1
24


(4)3÷(
1
2
×
2
3
+
1
5
),
=3÷(
1
3
+
1
5
),
=3÷
8
15

=
45
8


(5)(
1
8
+
作业帮用户 2017-11-15