早教吧 育儿知识 作业答案 考试题库 百科 知识分享

(1)1÷0.8=(2)320÷75%=(3)45×8÷45=(4)34-712=(5)720+(814-635)÷234=(6)(15+13-16)×30=(7)[710-(12+25×50%)]÷167=(8)1637-(225+337)=(9)10÷[83-(513÷526+25)]=(10)35×(17+821

题目详情
(1)1÷0.8= (2)
3
20
÷75%=
(3)
4
5
×8÷
4
5
=
(4)
3
4
-
7
12
=
(5)
7
20
+(8
1
4
-6
3
5
)÷2
3
4
=
(6)(
1
5
+
1
3
-
1
6
)×30=
(7)[
7
10
-(
1
2
+
2
5
×50%)]÷
16
7
=
(8)16
3
7
-(2
2
5
+3
3
7
)=
(9)10÷[
8
3
-(
5
13
÷
5
26
+
2
5
)]=
(10)
3
5
×(
1
7
+
8
21
÷
2
3
)=
▼优质解答
答案和解析

(1)1÷0.8=1.25;

(2)
3
20
÷75%=
1
5


(3)
4
5
×8÷
4
5

=
4
5
÷
4
5
×8,
=1×8,
=8;

(4)
3
4
-
7
12

=
9
12
-
7
12

=
1
6


(5)
7
20
+(8
1
4
-6
3
5
)÷2
3
4

=
7
20
+1
13
20
÷2
3
4

=
7
20
+
3
5

=
19
20


(6)(
1
5
+
1
3
-
1
6
)×30,
=
1
5
×30+
1
3
×30-
1
6
×30,
=6+10-5,
=16-5,
=11;

(7)[
7
10
-(
1
2
+
2
5
×50%)]÷
16
7

=[
7
10
-(
1
2
+
1
5
)]÷
16
7

=[
7
10
-
7
10
16
7

=0÷
16
7

=0;

(8)16
3
7
-(2
2
5
+3
3
7
),
=16
3
7
-2
2
5
-3
3
7

=16
3
7
-3
3
7
-2
2
5

=13-2
2
5

=10
3
5


(9)10÷[
8
3
-(
5
13
÷
5
26
+
2
5
)],
=10÷[
8
3
-(2+
2
5
)],
=10÷[
8
3
-2
2
5
],
=10÷
4
15

=
75
2


(10)
3
5
×(
1
7
+
8
21
÷
2
3
),
=
3
5
×(
1
7
+
4
7
),
=
3
5
×
5
7

=
3
7