Question

решите пожалуйста, удобным способом, срочно

Answer 1

(7+5/12)*12= (7*12+5)/12*12=7*12+5=84+5=89

9*(4/79)=(4*9)/79=36/79

Answer 2

7-1/5/12*6/12/16-1/5/12=5/7/12: 3/7/16:6/7/10=67 17*10 17=10/16 5/75/100-3/1/6=2 450*100/60=350/600 2/350/600:15/5/10=10сокращаем55=10/60 10/12+10/60=50+10=60на60=1