问题 解答题
怎样简便就怎样计算:
9
10
×
7
8
÷(
4
5
+
1
4
5-
7
8
-0.125
1
4
-
1
4
×
1
2
)÷
1
4
5
6
+
9
8
×
5
9
×
8
9
5
6
+
5
6
÷
1
9
7
9
×(1÷
7
8
+
8
7
÷1)
34
50
×
4
7
-
4
7
×
9
50
99×
99
100
答案

(1)

9
10
×
7
8
÷(
4
5
+
1
4
),

=

63
80
÷
21
20

=

3
4

(2)5-

7
8
-0.125,

=5-(

7
8
+0.125),

=5-1,

=4;

(3)(

1
4
-
1
4
×
1
2
)÷
1
4

=(

1
4
-
1
4
×
1
2
)×4,

=

1
4
×4-
1
4
×
1
2
×4,

=1-

1
2

=

1
2

(4)

5
6
+
9
8
×
5
9
×
8
9

=

5
6
+
9
8
×
8
9
×
5
9

=

5
6
+
5
9

=

25
18

(5)9×

5
6
+
5
6
÷
1
9

=9×

5
6
+
5
6
×9,

=9×(

5
6
+
5
6
),

=9×

5
3

=15;

(6)

7
9
×(1÷
7
8
+
8
7
÷1),

=

7
9
×(
8
7
+
8
7
),

=

7
9
×
16
7

=

16
9

(7)

34
50
×
4
7
-
4
7
×
9
50

=(

34
50
-
9
50
4
7

=

1
2
×
4
7

=

2
7

(8)99×

99
100

=(100-1)×

99
100

=100×

99
100
-1×
99
100

=99-

99
100

=98

1
100

问答题 简答题
问答题 简答题