问题 解答题
脱式计算:(能简算的要简算)
6
15
×
1
7
+
8
15
÷7

9
10
÷[
1
2
×(
6
5
-
3
10
)]

8.6×2
3
4
-0.6÷
4
11
答案

(1)

6
15
×
1
7
+
8
15
÷7,

=

6
15
×
1
7
+
8
15
×
1
7

=(

6
15
+
8
15
)×
1
7

=

14
15
×
1
7

=

2
15

(2)

9
10
÷[
1
2
×(
6
5
-
3
10
)],

=

9
10
÷[
1
2
×
9
10
],

=

9
10
÷
9
20

=2;

(3)8.6×2

3
4
-0.6÷
4
11

=8.6×

11
4
-0.6×
11
4

=(8.6-0.6)×

11
4

=8×

11
4

=22.

单项选择题
单项选择题