问题 解答题
下面各题怎样简便就怎样算.
456+322+178(780-724)×15973-245-2551800-1800÷15.
答案

(1)456+322+178,

=456+(322+178),

=456+500,

=956;

(2)(780-724)×15,

=56×15,

=840;

(3)973-245-255,

=973-(245+255),

=973-500,

=473;

(4)1800-1800÷15,

=1800-120,

=1680.

单项选择题
单项选择题