Question

Помогите )))))))
))))))))

Answer 1

(2/5+3/15)=2/5+1/5=3/5
(2 1/4-1/3)=9/4-1/3=27/12-4/12=23/12
3/5*23/12*25/12=3*23*25/5*12*12=23*5/4*12=115/48=2 19/48

Answer 2

2/5+3/15=2/5+1/5=3/5
2 1/4-1/3=9/4-1/3=27/12-4/12=23/12
3/5×23/12=23/20
23/20÷12/25=23/20×25/12=115/48=2 19/48