Question

Выполните сложение
4/5+3/7=
5/12+9/20=
5/18+4+45=
12/17+27/34=

Answer 1

4/5+3/7=(4*7+3*5)/35=43/35=1 8/35

5/12+9/20=(5*10+9*6)/120=104/120=57/60

5/18+4+45=5/18+49=49 5/18

12/17+27/34=(12*2+27)/34=51/34=3/2=1 1/2