问题 解答题

用简便方法计算.

(1)0.8×5.64×1.25

(2)7.68×0.4×2.5.

答案

(1)0.8×5.64×1.25

=0.8×1.25×5.64,

=1×5.64,

=5.64.

(2)7.68×0.4×2.5

=7.68×(0.4×2.5),

=7.68×1,

=7.68.

单项选择题
单项选择题