问题 解答题
怎样算简便就怎样算
(1)
1
5
×8÷
4
5
(2)1-
7
9
÷
7
8
(3)(
5
6
-
2
3
)×
9
10
(4)
3
4
÷
5
6
÷
7
8
答案

(1)

1
5
×8÷
4
5

=

8
5
÷
4
5

=2;

(2)1-

7
9
÷
7
8

=1-

8
9

=

1
9

(3)(

5
6
-
2
3
)×
9
10

=

1
6
×
9
10

=

3
20

(4)

3
4
÷
5
6
÷
7
8

=

9
10
×
8
7

=

36
35

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