问题 解答题
怎样简便就怎样算.
1
5
×8÷
4
5

3
5
+
1
2
×
4
5

5
6
÷
2
3
÷
5
6

(
5
8
+
6
5
4
25

(
5
6
-
2
3
9
10

1-
7
9
÷
7
8
答案

(1)

1
5
×8÷
4
5

=

8
5
×
5
4

=2;

(2)

3
5
+
1
2
×
4
5

=

3
5
+
2
5

=1;

(3)

5
6
÷
2
3
÷
5
6

=

5
6
÷
5
6
÷
2
3

=1×

3
2

=

3
2

(4)(

5
8
+
6
5
)×
4
25

=

73
40
×
4
25

=

73
250

(5)(

5
6
-
2
3
)×
9
10

=

1
6
×
9
10

=

3
20

(6)1-

7
9
÷
7
8

=1-

7
9
×
8
7

=1-

8
9

=

1
9

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