列式计算.(1)一个数除以5,商是69余2,这个数是多少?(2)甲数是30.5,比乙数多2.65,求乙数.
3÷ ==0.75=6: = %
3÷ ==0.6=6: = %.
3:5==9: == .
=0.375=12÷ = %=0.45= %= ÷ .
= ÷ = = % ÷ =0.25== %