早教吧 育儿知识 作业答案 考试题库 百科 知识分享

415÷95+1115×5978×1211−38×1112165×3÷45(3−1.4)÷815.

题目详情
4
15
÷
9
5
+
11
15
×
5
9
           
7
8
×
12
11
3
8
×
11
12
16
5
×3÷
4
5
                  
(3−1.4)÷
8
15
▼优质解答
答案和解析
(1)
4
15
÷
9
5
+
11
15
×
5
9

=
4
15
×
5
9
+
11
15
×
5
9

=(
4
15
+
11
15
)×
5
9

=1×
5
9

=
5
9


(2)
7
8
×
12
11
-
3
8
×
11
12

=
21
22
-
11
32

=
336
352
-
121
352

=
215
352


(3)
16
5
×3÷
4
5

=
16
5
×
5
4
×3,
=12;

(4)(3−1.4)÷
8
15

=1.6×
15
8

=3.