问题 解答题

计算

125×25×32     31×55+68×55+55

201×28  26×199.

答案

(1)125×25×32 

=125×25×4×8

=(125×8)×(25×4)

=1000×100

=100000;

(2)31×55+68×55+55

=55×(31+68+1)

=55×100

=5500;

(3)201×28

=(200+1)×28

=200×28+28

=5600+28

=5628;

(4)26×199

=26×(200-1)

=26×200-26

=5200-26

=5174;

故答案为100000;5500;5628;5174.

单项选择题 A1/A2型题
问答题 简答题