早教吧 育儿知识 作业答案 考试题库 百科 知识分享

脱试计算.(能简算得要简算)807×99+807(314+116)×14×16317-5.64+367-2.36[78-(12+14)]÷916506÷(207×42-8692)2÷425÷2512

题目详情
脱试计算.(能简算得要简算)
807×99+807     

3
14
+
1
16
)×14×16        

3
1
7
-5.64+3
6
7
-2.36
[
7
8
-(
1
2
+
1
4
)]÷
9
16
506÷(207×42-8692)
4
25
÷
25
12
▼优质解答
答案和解析
(1)807×99+807
=807×(99+1)
=807×100
=80700;

(2)(
3
14
+
1
16
)×14×16
=
3
14
×14×16+
1
16
×14×16
=48+14
=62;

(3)3
1
7
-5.64+3
6
7
-2.36
=(3
1
7
+3
6
7
)-(5.64+2.36)
=7-8
=-1;

(4)[
7
8
-(
1
2
+
1
4
)]÷
9
16

=[
7
8
-
3
4
9
16

=
1
8
÷
9
16

=
2
9


(5)506÷(207×42-8692)
=506÷(8694-8692)
=506÷2
=253;

(6)2÷
4
25
÷
25
12

=2÷(
4
25
×
25
12

=2÷
1
3

=6.