75﹣75÷5= 40+360÷90= 15×4×8= 1000÷25÷8= 13×6= .
0.75= :8=15÷ == %
= :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÷ = %