Question

ACTIVIDAD 1 resuelvan las siguientes sumas y restas con numero cionales: 1/2-3/5-2/5
2/11-3/2+5/11-1
7/5+1/6-2/3
1/9+3/4+5/4-1/3+1​

Answer 1

Explicación paso a paso:

1)

$\frac{1}{2} - \frac{3}{5} - \frac{2}{5} \\ = \frac{5 - 6}{10} - \frac{2}{5} \\ = \frac{ - 1}{10} - \frac{2}{5} \\ = \frac{ - 5 - 20}{ 50} \\ = \frac{ - 25}{50} \\ = - \frac{1}{2}$

2)

$\frac{2}{11} - \frac{3}{2} + \frac{5}{11 - 1} \\ = \frac{4 - 33}{22} + \frac{5}{10} \\ = \frac{ - 29}{22} + \frac{5}{10} \\ = \frac{ - 145 + 55}{110} \\ = \frac{ - 90}{110} \\ = - \frac{9}{11}$

3)

$\frac{7}{5} + \frac{1}{6} - \frac{2}{3} \\ = \frac{42 + 5}{30} - \frac{2}{3} \\ = \frac{47}{30} - \frac{2}{3} \\ = \frac{47 - 20}{30} \\ = \frac{27}{30} \\ = \frac{9}{10}$

4)

$\frac{1}{9} + \frac{3}{4} + \frac{5}{4} - \frac{1}{3 + 1} \\ = \frac{4 + 27}{36} + \frac{5}{4} - \frac{1}{4} \\ = \frac{31}{36} + \frac{5}{4} - \frac{1}{4} \\ = \frac{31 + 45}{36} - \frac{1}{4} \\ = \frac{76}{36} - \frac{1}{4} \\ = \frac{76 - 9}{36} \\ = \frac{67}{36}$