甲乙两数之比是3:4,它们的和是1.4,则甲数是 ,乙数是 .
=0.75== : = %
= : =75%=3÷ = .(填小数)
10÷ = :75== %= (填小数).
÷4=2=3=.
÷ = %=0.375=.