早教吧 育儿知识 作业答案 考试题库 百科 知识分享

能简算的要简算.(512-14)÷56;136×0.5+64×50%;813÷7+17×713;0.2×613+15×913+1113×20%.

题目详情
能简算的要简算.
5
12
-
1
4
)÷
5
6
;           
136×0.5+64×50%;
8
13
÷7+
1
7
×
7
13
;     
0.2×
6
13
+
1
5
×
9
13
+
11
13
×20%.
▼优质解答
答案和解析
(1)(
5
12
-
1
4
)÷
5
6

=
1
6
÷
5
6

=
1
5


(2)136×0.5+64×50%
=(136+64)×50%
=100×50%
=50;

(3)
8
13
÷7+
1
7
×
7
13

=
1
7
×(
8
13
+
7
13

=
1
7
×1
=
1
7


(4)0.2×
6
13
+
1
5
×
9
13
+
11
13
×20%
=0.2×(
6
13
+
9
13
+
11
13

=0.2×2
=0.4.