问题 解答题
1
7
×36%+36%×
6
7
48%×10.7-0.7×48%
5
8
×0.42+
3
8
×42%
1
4
×
3
4
+25%×75%
答案

(1)

1
7
×36%+36%×
6
7

=(

1
7
+
6
7
)×36%,

=36%;

(2)48%×10.7-0.7×48%,

=(10.7-0.7)×48%,

=10×48%,

=4.8;

(3)

5
8
×0.42+
3
8
×42%,

=(

5
8
+
3
8
)×0.42,

=0.42;

(4)

1
4
×
3
4
+25%×75%,

=

3
16
+
3
16

=

3
8

单项选择题
单项选择题