早教吧 育儿知识 作业答案 考试题库 百科 知识分享

怎样简便就怎样算14+34×33×(215+112)-1424×(38+13+512)917÷7+17×8172627×28(512-37)-(47-712)

题目详情
怎样简便就怎样算
1
4
+
3
4
×3

3×(
2
15
+
1
12
)-
1
4
24×(
3
8
+
1
3
+
5
12
9
17
÷7+
1
7
×
8
17
26
27
×28
5
12
-
3
7
)-(
4
7
-
7
12
▼优质解答
答案和解析
(1)
1
4
+
3
4
×3,
=
1
4
+
9
4

=
5
2


(2)3×(
2
15
+
1
12
)-
1
4

=3×
2
15
+3×
1
12
-
1
4

=
2
5
+
1
4
-
1
4

=
2
5
+(
1
4
-
1
4
),
=
2
5
+0,
=
2
5


(3)24×(
3
8
+
1
3
+
5
12
),
=24×
3
8
+24×
1
3
+24×
5
12

=9+8+10,
=27;

(4)
9
17
÷7+
1
7
×
8
17

=
9
17
×
1
7
+
作业帮用户 2017-10-13