Question

ajutati-ma va rog e urgennntttttttt

Answer 1

Răspuns:

c) $\frac{7}{15}$ - [ $\frac{106-10}{90}$  - $\frac{2*6+1}{6}$ - ( $\frac{7}{10}$ - $\frac{3}{9}$) ] = $\frac{7}{15}$- $\frac{96}{90}$ + $\frac{13}{6}$  - $\frac{7*9- 3*10}{90}$= $\frac{7}{15}$ +$\frac{13}{6}$ - $\frac{96}{90}$ - $\frac{33}{90}$=

= $\frac{7*2- 13*5}{30}$ - $\frac{96-33}{90}$= $\frac{14- 65}{30}$ - $\frac{63}{90}$= $\frac{51}{30}$ - $\frac{21}{30}$= $\frac{51-21}{30}$= $\frac{30}{30}$= 1

d) $\frac{4}{5}$ - $\frac{1}{9}$ -(  $\frac{206-20}{90}$ - $\frac{3}{9}$ ) + $\frac{2}{45}$  = $\frac{4*9- 1*5}{45}$ - ( $\frac{186}{90}$ - $\frac{3}{9}$) + $\frac{2}{45}$ = $\frac{31}{45}$ -( $\frac{93}{45}$ - $\frac{3}{9}$) + $\frac{2}{45}$= $\frac{33}{45}$ - $\frac{93- 3*5}{45}$=

= $\frac{33}{45}$ - $\frac{78}{45}$ = $\frac{33-78}{45}$= $\frac{-45}{45}$= -1