问题 解答题
简便运算.
25×125×3275×2.5+25×3.672×(
3
8
+
2
9
5
16
×
3
8
×16×8.
答案

(1)25×125×32,

=25×125×8×4,

=(25×4)×(125×8),

=100×1000,

=100000;

(2)75×2.5+25×3.6,

=75×2.5+2.5×36,

=(75+36)×2.5,

=111×2.5,

=277.5;

(3)72×(

3
8
+
2
9
),

=72×

3
8
+72×
2
9

=27+16,

=43;

(4)

5
16
×
3
8
×16×8,

=(

5
16
×16)×(
3
8
×8),

=5×3,

=15.

判断题
单项选择题