5/9m^2n and 5/16mn^3

m+n/12mn and n+m/18m^3n

m-n/24mn^4 and m-n/16m^4n

what is the least common denominator?

144m^2*n^3

36m^3n

48m^4n^4

Step-by-step explanation:

I have 9m^2n=3^2m^2n and 16mn^3=2^4mn^3 as denominators

the least common denominator = 9*16*m^2*n^3=144m^2*n^3

I have 12mn=2^2*3mn and 18m^3n=2*3^2m^3n as denominators

the least common denominator=2^2*3^2m^3n=36m^3n

I have 24mn^4=2^3*3mn^4 and 16m^4n=2^4m^4n as denominators

the least common denominator=2^4*3m^4n^4=48m^4n^4