问题 解答题
用简便方法计算.
1.25×32×2.5
8.57×1.4+85.7×0.86
3
5
×
7
11
+
3
5
÷
11
4
答案

(1)1.25×32×2.5,

=(1.25×8)×(4×2.5),

=10×10,

=100;

(2)8.57×1.4+85.7×0.86,

=85.7×(0.14+0.86),

=85.7×1,

=85.7;

(3)

3
5
×
7
11
+
3
5
÷
11
4

=

3
5
×(
7
11
+
4
11
),

=

3
5
×1,

=

3
5

单项选择题 A1/A2型题
问答题 简答题