问题 解答题
计算,能简算的要简算.
7
13
÷8+
1
8
×
6
13

11
23
×
7
9
÷
22
23

1
2
×
2
3
+
3
10

1
9
×[9÷(
1
9
×9)]
答案

(1)

7
13
÷8+
1
8
×
6
13

=

7
13
×
1
8
+
1
8
×
6
13

=(

7
13
+
6
13
)×
1
8

=1×

1
8

=

1
8

(2)

11
23
×
7
9
÷
22
23

=

11
23
×
7
9
×
23
22

=

7
18

(3)

1
2
×
2
3
+
3
10

=

1
3
+
3
10

=

19
30

(4)

1
9
×[9÷(
1
9
×9)],

=

1
9
×[9÷1],

=

1
9
×9,

=1.

单项选择题
单项选择题