小数除法简便计算题3.6*2.5脱式······简单明了

问题描述:

小数除法简便计算题3.6*2.5脱式······简单明了
除法····

3.6*2.5
=0.9*4*2.5
=0.9*(4*2.5)
=0.9*10
=9除法····打错符号了3.6/2.5=3.6*4/(2.5*4)=14.4/10=1.44