求下列每组数的最大公因数和最小公倍数。 9和10 15和45 16和40
= :24=5:8= :40= %
3÷ ==0.75=6: = %
3÷ ==0.6=6: = %.
3:5==9: == .
=0.375=12÷ = %=0.45= %= ÷ .