1.6×0.35×5=0.35×(1.6×5)是运用了乘法的交换律和结合律. .
÷12===10÷( )=.
= %=12÷ =9: =.
÷ == :16= 小数.
÷ ==0.4= %= : .
=12÷ = :10=1.5= %