Question

Suma y resta de fracciones.

Answer 1

Resuelve las siguientes operaciones

3/4 + 1/12 - 1/6 = 9/12+1/12-2/12= 9+1-2/12=8/12 = 2/3

Nota simplificas 8/12 = primero en 2 saldrá 4/6 y luego en 2 dará resultado en 2/3

4/6 - 1/3 + 2/5= 2/3 - 1/3 + 2/5 = 1+3 +2/5 = 5/15+6/15 = 5 + 6 / 15 = 11/15

3/8 + 2/5 + 1/6 = 45/120 + 48/120 + 20/120 = 48 + 45+ 20/120 = 113/120

6/8 - 7/4 + 1/12 = 3/4 - 7/4 + 1/12 = -1 + 1/2 = -1 * 12 + 1 /12 = -11/12

3/5 - 7/4 + 1/12 = 36/60 - 105/60 + 5/60 = 36 - 105 + 5/ 60 = -64/60 = -16/15

6/7 + 1/4 - 1/2 = 24/28 + 7/28 - 14/28 = 24+7-14/28 =17/28

Answer 2

1.
$\frac{3}{4} + \frac{1}{12} - \frac{1}{6}$
mcm= 12
$= \frac{9 + 1 - 2}{12} \\ = \frac{8}{12} \\ = \frac{2}{3}$
2.
$\frac{4}{6} - \frac{1}{5} + \frac{2}{5} \\ = \frac{2}{3} + \frac{1}{5 } \\ = \frac{10 + 3}{15} \\ = \frac{13}{15}$
3.
$\frac{3}{8} + \frac{2}{5} + \frac{1}{6}$
mcm= 120
$\frac{45 + 48 + 20}{120} \\ = \frac{113}{120}$
4.

$\frac{6}{8} - \frac{7}{4} + \frac{1}{12}$
mcm=24
$\frac{18 - 42 + 2}{24} \\ = \frac{ - 22}{24} \\ = \frac{ - 11}{12}$
5.
$\frac{3}{5} - \frac{1}{4} + \frac{2}{3}$
mcm= 60
$\frac{36 - 15 + 40}{60} \\ = \frac{61}{60}$
6.
$\frac{6}{7} + \frac{1}{4} - \frac{1}{2}$
mcm=28
$\frac{24 + 7 - 14}{28} \\ = \frac{17}{28}$