脱式计算50.4×1.9-1.8                       3.76×0.25+25.8

问题描述:

脱式计算
50.4×1.9-1.8                      
3.76×0.25+25.8

(1)50.4×1.9-1.8,
=95.76-1.8,
=93.96;
(2)3.76×0.25+25.8,
=0.94+25.8,
=26.74.
答案解析:(1)先算乘法,再算减法;
(2)先算乘法,再算加法.
考试点:小数四则混合运算.
知识点:考查了四则混合运算.注意运算顺序和运算法则,然后再进一步计算.