Question

apasati pe poza de mai jos:

Answer 1

(1:2+2:3-1:4)-(2:5+1:4-1:2)=(0,5+0,(6)-0,25)-(0,4+0,25-0,5)=(1,1(6)-0,25)-(0.65-0,5)=0,91(6)-0,15=0,7(6)

Answer 2

$( \frac{1}{2} + \frac{2}{3} - \frac{1}{4} )-( \frac{2}{5} + \frac{1}{4} - \frac{1}{2} )$
Aducem la acelasi numitor. In prima paranteza numitorul comun este 12,in cea de-a doua paranteza numitorul comun este 20.
[tex]( \frac{1}{2} + \frac{2}{3} - \frac{1}{4} )-( \frac{2}{5} + \frac{1}{4} - \frac{1}{2} )= \\ ( \frac{6+8-3}{12} )-( \frac{8+5-10}{20})= \frac{11}{12} - \frac{3}{20} = \frac{11*5-3*3}{60} = \\ \frac{55-9}{60}= \frac{46}{60} = \frac{23}{30} [/tex]