问题 解答题
计算下列各题.(能简算的要简算)
3
10
÷6×
2
3
15×(
2
3
+
3
5
2
3
÷8+
1
3
×
1
8
[3-(
3
4
-
3
8
)]÷
9
2
4
5
+
3
10
)÷
3
10
5
12
÷
31
30
+
30
31
×
7
12
答案

(1)

3
10
÷6×
2
3

=

1
20
×
2
3

=

1
30

(2)15×(

2
3
+
3
5
),

=15×

2
3
+15×
3
5

=10+9,

=19;

(3)

2
3
÷8+
1
3
×
1
8

=

2
3
×
1
8
+
1
3
×
1
8

=(

2
3
+
1
3
)×
1
8

=1×

1
8

=

1
8

(4)[3-(

3
4
-
3
8
)]÷
9
2

=[3-

3
8
9
2

=

21
8
÷
9
2

=

7
12

(5)(

4
5
+
3
10
)÷
3
10

=

11
10
÷
3
10

=

11
3

(6)

5
12
÷
31
30
+
30
31
×
7
12

=

5
12
×
30
31
+
30
31
×
7
12
,!

=(

5
12
+
7
12
)×
30
31

=1×

30
31

=

30
31

单项选择题
问答题 简答题