问题 解答题
选择合理的方法计算:
4.25×0.125×80.65×2014.8×0.251.2×2.5+0.8×2.5.
答案

①4.25×0.125×8,

=4.25×(0.125×8),

=4.25×1,

=4.25;

②0.65×201,

=0.65×(200+1),

=0.65×200+0.65×1,

=130+0.65,

=130.65;

③4.8×0.25,

=1.2×(4×0.25),

=1.2×1,

=1.2;

④1.2×2.5+0.8×2.5,

=(1.2+0.8)×2.5,

=2×2.5,

=5.

填空题
选择题