问题 解答题
简便计算.(要写出主要简便过程)
11
13
×
3
8
+
5
8
×
11
13

1
4
×
3
7
+
4
7
÷4

17
18
×
9
10
+
17
18
÷10
答案

(1)

11
13
×
3
8
+
5
8
×
11
13

=(

3
8
+
5
8
)×
11
13

=1×

11
13

=

11
13

(2)

1
4
×
3
7
+
4
7
÷4

=

1
4
×
3
7
+
4
7
×
1
4

=

1
4
×(
3
7
+
4
7

=

1
4
×1

=

1
4

(3)

17
18
×
9
10
+
17
18
÷10

=

17
18
×
9
10
+
17
18
×
1
10

=

17
18
×(
9
10
+
1
10

=

17
18
×1

=

17
18

单项选择题
单项选择题