边长是1厘米的正方形,面积是1平方分米. .
= :24== %=.
甲数除以乙数的上是2.75,那么甲数与乙数的最简整数比是 .
= ÷ = %=6: .
÷20=0.8==20÷ = %
==16÷ = %