Question

va rog frumos urgent ex 8,9 pag 119​

Answer 1

Răspuns:

8. a)$\frac{3}{5} *(\frac{1}{2} - \frac{3}{2} )$= $\frac{3}{5} *( \frac{1-3}{2} )$= $\frac{3}{5} *\frac{-2}{2}$= - $\frac{3}{5}$

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

c) ( 1+ $\frac{1}{3}$) * ( 8,3- 2,3)= ( 1+ $\frac{1}{3}$) * 6= $\frac{3*1+1}{3}$ * 6= $\frac{4}{3}$ *6= 24/3= 8

d) $\frac{4}{9}$ *( 1- $\frac{1}{5} -\frac{7}{10}$)= $\frac{4}{9}$ * ($\frac{10-2-7}{10}$)= $\frac{4}{9}$ * $\frac{1}{2*5}$= $\frac{2}{45}$