问题 解答题
下面各题,怎样简便就怎样算
(
3
4
-
1
2
5
8
960-630÷18×17
5
9
×
3
7
÷
5
8
11
10
×[1÷(
4
5
-
1
4
)]
答案

(1)(

3
4
-
1
2
)÷
5
8

=

1
4
×
8
5

=

2
5

(2)960-630÷18×17

=960-35×17

=960-595

=365;

(3)

5
9
×
3
7
÷
5
8

=

5
9
×
3
7
×
8
5

=

8
21

(4)

11
10
×[1÷(
4
5
-
1
4
)]

=

11
10
×[1÷
11
20
]

=

11
10
×
20
11

=2.

综合
选择题