问题 解答题
递等式计算(能简算的要简算):9%
1
3
-
1
5
)×15(
1
8
+
3
4
)×
1
7
75×
1
4
+25×25%
答案

①(

1
3
-
1
5
)×15

=

1
3
×15-
1
5
×15,

=5-3,

=2;

②(

1
8
+
3
4
)×
1
7

=

7
8
×
1
7

=

1
8

③75×

1
4
+25×25%

=(75+25)×25%,

=100×25%,

=25.

判断题
单项选择题 A1/A2型题