= 27÷ = 45× = ÷ =
= ÷ = 32× = ÷22=
三种蔬菜钙、磷含量比较表
哪种蔬菜的钙、磷含量比最高?哪种最低?为什么?
0.24÷0.6= ×1.2= 16÷20%=
12÷0.25÷4= 4.8÷(0.4+1.2)=