问题 解答题
用简便方法计算下面各题.
23.5-(23.5-9.36)
12.4×1.25-4.4+125%
7.5×25
3
4
+1.5×25.75+25.75.
答案

(1)23.5-(23.5-9.36),

=23.5-23.5+9.36,

=0+9.36,

=9.36;

(2)12.4×1.25-4.4+125%,

=(12.4-4.4)×1.25,

=8×1.25,

=10;

(3)7.5×25

3
4
+1.5×25.75+25.75,

=(7.5+1.5+1)×25.75,

=10×25.75,

=257.5.

单项选择题
判断题