问题 解答题
计算下列各题.
5
8
+
1
4
)÷
7
16
13
15
÷
39
45
×
3
10
5
6
-
2
3
)×
9
10
1-
7
9
÷
7
8
(0.75-
3
16
)×(
2
9
+
1
3
7
16
-
1
2
×
7
8
答案

(1)(

5
8
+
1
4
)÷
7
16

=

7
8
×
16
7

=2;

(2)

13
15
÷
39
45
×
3
10

=

13
15
×
45
39
×
3
10

=

3
10

(3)(

5
6
-
2
3
)×
9
10

=

1
6
×
9
10

=

3
20

(4)1-

7
9
÷
7
8

=1-

7
9
×
8
7

=1-

8
9

=

1
9

(5)(0.75-

3
16
)×(
2
9
+
1
3
),

=(

3
4
-
3
16
)×
5
9

=

9
16
×
5
9

=

5
16

(6)

7
16
-
1
2
×
7
8

=

7
16
-
7
16

=0.

填空题
名词解释