问题 解答题
用简便方法计算
4.8×0.252.33×0.5×41.2×2.5+0.8×2.53.7÷1.25÷8.
答案

(1)4.8×0.25,

=1.2×(4×0.25),

=1.2×1,

=1.2;

(2)2.33×0.5×4,

=2.33×(0.5×4),

=2.33×2,

=4.66;

(3)1.2×2.5+0.8×2.5,

=(1.2+0.8)×2.5,

=2×2.5,

=5;

(4)3.7÷1.25÷8.

=3.7÷(1.25×8),

=3.7÷10,

=0.37.

单项选择题
单项选择题