比较大小①3.25 3.52 ②4.08 3.99 ③1.56 0.65 ④0.458 0.5.
3: ===24÷ = %
10÷ == : = (小数)= %
:20==24÷ =80%
3:4==24÷ = %= .(填小数)
75÷ == .