Question

xfavor respondan la nesesito un poco rapido

Answer 1

mcm(4,5)=20

($\frac{15}{20} +\frac{4}{20}$)-$\frac{1}{2}$=

=$\frac{19}{20} -\frac{1}{2}$=$\frac{19}{20} -\frac{10}{20}$=

=$\frac{9}{20}$