(Χ是非零自然数),它的分数单位是 ;当x为 时,它是最小的假分数;当x小于 时,它是真分数;当x为 时,它是最小的合数.
÷8==0.375=9÷ =; 填质数:21= + ; = × .
= %=2÷ =四成.
14÷ == ÷ = (填小数)
= ÷12= (填小数).
12÷ =0.75=.