已知□.□□≈1.5,则□.□□最大是 ,最小是 .
= %=一成半= (用小数表示)
× = ÷== %.
27÷ == :2== (填小数)
== ÷12= (小数)
=9: = :20= ÷ a:4=3a: = :4+2.