Question

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Answer 1

Răspuns:

Explicație pas cu pas:

     

Answer 2

Răspuns:

Explicație pas cu pas:

f) [2,(3)+1,2(3)-1 1/3]·0,75= (21/9+111/90-4/3)·75/100=[(210+111-120)/90]·3/4=

(201/90)·3/4=(201·3)/(90·4)=67/40

g) 5/14·[58/45:(5/6-3/4+1/4)-4/5]= 5/14·[58/45:(5/6-2/4)-4/5]=

5/14·[58/45:(5/6-1/2)-4/5]=5/14·[58/45:(5-3)/6-4/5]=5/14·[58/45:2/6-4/5]=

5/14·[58/45:1/3-4/5]=5/14·[58/45·(3/1)-4/5]= 5/14·[58·3/45-4/5]=

5/14·(58/15-4/5)=5/14·(58-12)/15= (5/14)·(46/15)=(5·46)/(14·15)= 46/(14·3)= 46/42=23/21