Question

Помогите, даю 50 баллов

Answer 1

Răspuns:

Explicație pas cu pas:

[(35/39):(7/13)]:[(49/36):(7/4)]=[(35/39)·(13/7)]:[(49/36)·(4/7)]=

[(35/3)·(1/7)]:[(7/36)·(4/1)]=[(5/3)·(1/1)]:[(7/9)·(1/1)]=(5/3):(7/9)=(5/3)·(9/7)=(5/1)·(3/7)=15/7

(-2 4/5):(1 2/5)=(-14/5):(7/5)=(-14/5)·(5/7)=(-2/5)·(5/1)=-2

1,72:0,05-28,13=(172/100):(5/100)-2813/100=(172/100)·(100/5)-2813/100=

172/5-2813/100=(172·20-2813)/100=(3440-2813)/100=627/100=6,27

3,72:0,6+6,84:(-1,8)=(372/100):(6/10)+(684/100):(-18/10)=

(372/100)·(10/6)+(684/100)·(-10/18)=(372/10)·(1/6)+(684/10)·(-1/18)=

62/10+(-38/10)=(62-38)/10=24/10=2,4