Question

Identificati factorul comun și efectuați calculele, folosindu-l. Ex8​

Answer 1

$\it a)\ \ = \dfrac{3}{5}\Big(\dfrac{1}{2}-\dfrac{3}{2}\Big)=\dfrac{3}{5}\cdot\dfrac{1-3}{2}=\dfrac{3}{5}\cdot\dfrac{-2}{2}=\dfrac{3}{5}\cdot(-1)=-\dfrac{3}{5}\\ \\ \\ b)\ \ =1,5\cdot(-5,1-4,2-3,3)=1,5\cdot(-12,6)=-18,9\\ \\ \\ c)\ =(1+\dfrac{1}{3})\cdot(8,3-2,3)=\dfrac{4}{3}\cdot6=\dfrac{24}{3}=8$

Answer 2

Răspuns:

a) (3/5)·(1/2)·(1-3) = 3·1·(-2)/(5·2) = -6/10 = -0,6

b) -1,5·(5,1+4,2+3,3) = -1,5·12,6 = 18,9

c) (1+1/3)·(8,3-2,3) = (4/3)·6 = 4·2 = 8

d) 4/9·(1-1/5-7/10) = 4/9·(10-2-7)/10 = 4/9·1/10 = 4/90 = 2/45