用2.8与1.2的和乘0.25所得的积去除5.6,商是多少?怎样列式?

问题描述:

用2.8与1.2的和乘0.25所得的积去除5.6,商是多少?怎样列式?

5.6/{(2.8+1.2)*0.25}=5.6/1=5.6