问题
填空题
用简便方法计算4.2÷0.4÷0.25,应先算______,最后的商是______.
答案
4.2÷0.4÷0.25,
=4.2÷(0.4×0.25),
=4.2÷0.1,
=42.
故答案为:0.4×0.25,42.
用简便方法计算4.2÷0.4÷0.25,应先算______,最后的商是______.
4.2÷0.4÷0.25,
=4.2÷(0.4×0.25),
=4.2÷0.1,
=42.
故答案为:0.4×0.25,42.