问题 解答题

用简便方法计算.

(1)63.3×101

(2)55.2-1.375-2.625

(3)98×0.24+17.6×98.

答案

(1)63.3×101,

=63.3×(100+1),

=63.3×100+63.3,

=6330+63.3,

=6393.3;

(2)55.2-1.375-2.625,

=55.2-(1.375+2.625),

=55.2-4,

=51.2;

(3)98×2.4+17.6×98,

=(2.4+17.6)×98,

=20×98,

=1960.

单项选择题
单项选择题