题目内容

计算.
5
7
-
5
14
+
7
14
=
1-
5
7
×
2
5
=
1
5
+
3
5
×
2
9
=
1
2
+
3
8
)×
1
14
=
1-
1
2
×
4
11
=
3
14
×(
2
3
+
1
2
)=
分析:(1)按照从左到右顺序解答,
(2)(5)按照先算乘法,再算减法顺序解答,
(3)按照先算乘法,再算加法顺序解答,
(4)(6)按照先算括号里面的,再算括号外面的顺序解答.
解答:解:(1)
5
7
-
5
14
+
7
14

=
5
14
+
7
14

=
6
7


(2)1-
5
7
×
2
5

=1-
2
7

=
5
7


(3)
1
5
+
3
5
×
2
9

=
1
5
+
2
15

=
1
3


(4)(
1
2
+
3
8
)×
1
14

=
7
8
×
1
14

=
1
16


(5)1-
1
2
×
4
11

=1-
2
11

=
9
11


(6)
3
14
×(
2
3
+
1
2

=
3
14
×
7
6

=
1
4
点评:依据四则运算顺序正确进行计算,是本题考查知识点.
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网