Question

Completati tabelul: a=2/21,b=3 1/3,c= 4 1/7.Rezolvati:a+b,b+c,(a+b)+c,a+(b+c).

Answer 1

a+b= 2/21 + 31/3 (amplifici 31/3 cu 7) = 2/21+217/21 = 219/21

b+c= 31/3+41/7 (amplifici 31/3 cu 7 si 41/7 cu 3) = 217/21 + 123/21 = 340/21

(a+b) +c= ( 2/21 + 31/3) + 41/7 (amplifici 31/3 cu 7) = (2/21 + 217/21) + 41/7= 219/21 + 41/7 (amplifici 41/7 cu 3) = 219/21 + 123/21 = 342/21

a+( b+c) = 2/21 + ( 31/3 + 41/7) (amplifici 31/3 cu 7 si 41/7 cu 3) = 2/21 +(217/21 + 123/21)= 2/21 +340/21 = 342/21

Sper că ti.am fost de ajutor! Succes!