(-21.6)+3-7.4+(-2/5)= 7-(-1/2)+1.5= (-6/5)-7-(3.2

问题描述:

(-21.6)+3-7.4+(-2/5)= 7-(-1/2)+1.5= (-6/5)-7-(3.2
(-21.6)+3-7.4+(-2/5)=
7-(-1/2)+1.5=
(-6/5)-7-(3.2)+(-1)=

-26.49-12.4-12.4对吗?不对吗我不知道,你确定你算的对恩