问题 解答题
计算下面各题,能简便的简便.不简算答对扣2分.
15÷
5
9
+
1
6
×8
5x-3
3
4
=25
8
9
×
3
4
÷
8
15

8
17
÷23+
1
23
×
9
17
答案

(1)15÷

5
9
+
1
6
×8,

=27+1

1
3

=28

1
3

(2)5x-3

3
4
=25,

5x=25+3

3
4

5x=28

3
4

x=

23
4

(3)

8
9
×
3
4
÷
8
15

=

2
3
×
15
8

=

5
4

(4)

8
17
÷23+
1
23
×
9
17

=(

8
17
+
9
17
)×
1
23

=

1
23

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