试题与答案

下面各题,怎样算简便就怎样算.9-920÷9712×37×56512×725×3

题型:解答题

题目:

下面各题,怎样算简便就怎样算.
9-
9
20
÷9
7
12
×
3
7
×
5
6
5
12
×
7
25
×
3
14
7
9
÷
1
2
÷
35
36
3
5
×
8
9
×
5
8
17
12
×
3
34
÷
2
19

答案:

(1)9-

9
20
÷9

=9-

1
20

=8

19
20

(2)

7
12
×
3
7
×
5
6

=

1
4
×
5
6

=

5
24

(3)

5
12
×
7
25
×
3
14

=

1
40

(4)

7
9
÷
1
2
÷
35
36

=

7
9
÷
35
36
÷
1
2

=

4
5
÷
1
2

=1

3
5

(5)

3
5
×
8
9
×
5
8

=

1
3

(6)

17
12
×
3
34
÷
2
19

=

1
8
÷
2
19

=1

3
16

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