问题 解答题
3
7
÷
4
5
+
4
7
×
5
4

(
5
12
+
7
18
1
36
答案

(1)

3
7
÷
4
5
+
4
7
×
5
4

=

3
7
×
5
4
+
4
7
×
5
4

=(

3
7
+
4
7
)×
5
4

=1×

5
4

=

5
4

(2)(

5
12
+
7
18
)÷
1
36

=(

5
12
+
7
18
)×36,

=

5
12
×36+
7
18
×36,

=15+14,

=29.

单项选择题
单项选择题