问题 解答题
计算(能简算的要简算).
5
6
÷(1-
9
20
)×
5
9
4
5
×
6
11
+80%×
5
11
16
19
+
24
17
)×
1
8
+
17
19
答案

(1)

5
6
÷(1-
9
20
)×
5
9

=

5
6
÷
11
20
×
5
9

=

5
6
×
20
11
×
5
9

=

50
33
×
5
9

=

250
297

(2)

4
5
×
6
11
+80%×
5
11

=

4
5
×
6
11
+
4
5
×
5
11

=

4
5
×(
6
11
+
5
11
),

=

4
5
×1,

=

4
5

(3)(

16
19
+
24
17
)×
1
8
+
17
19

=

16
19
×
1
8
+
24
17
×
1
8
+
17
19

=

2
19
+
3
17
+
17
19

=(

2
19
+
17
19
)+
3
17

=1+

3
17

=1

3
17

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