Question

alguien puede acerlo
1/20 - 1/30... ​

Answer 1

suma de fracciones;

$\frac{1}{20} + \frac{1}{30} = \frac{30 + 20}{600} = \frac{50}{600} = \frac{10}{120} = \frac{5}{24} = \frac{1}{12}$

resta de fracciones:

$\frac{1}{20} - \frac{1}{30} = \frac{30 - 20}{600} = \frac{10}{600} = \frac{2}{120} = \frac{1}{60}$

¡suerte!