Question

( 58-35)+ 320=
56-(310+25)=
 
решить сократить 

Answer 1

вот.............................................

Answer 2

(5/8-3/5)+3/20=(25-24)/40+3/20=1/40+3/20=(1+6)/40=7/40
5/6-(3/10+2/5)=5/6-(3+4)/10=5/6-7/10=(50-42)/60=8/60=2/15