Question

Помогите плииииииз #435(1,2,3)

Answer 1

435.1)7/12+(-0,35)=7/12-7/20=35/60-21/60=14/60=7/30
2)-0,375+3/8=-0,375+0,375=0
3)-4/21+3/14=-8/42+9/42=1/42