Question

Vă rog! ! ! ! ! ! ! ! ! ! !

Answer 1

(- 2$\frac{3}{4}$ + 1$\frac{1}{6}$ ) + ( -1 $\frac{2}{3}$ + 2\frac{7}{12} ) = ( - \frac{11}{4} + \frac{7}{6} ) + ( -\frac{5}{3} + \frac{31}{12}) = \frac{14+31-33-20}{12} = \frac{14-22}{12} = -\frac{8}{12} = - \frac{2}{3}

Answer 2

c)
-11/4 + 7/6 - 5/3 + 31/12 =
(-11×3+7×2-5×4+31)/12 =
(-33+14-20+31)/12 =
-8/12 =
-2/3