Question

Add the following rational numbers: 12/15 ,-6/15
3/20 ,-7/-20

Answer 1

Answer:

$\frac{9}{10}$

Step-by-step explanation:

$= \frac{12}{15} + ( \frac{ - 6}{15} ) + \frac{3}{20} + ( \frac{ - 7}{ - 20} ) \\ = \frac{12}{15} - \frac{6}{15} + \frac{3}{20} + \frac{7}{20} \\ = \frac{48}{60} - \frac{24}{60} + \frac{9}{60} + \frac{21}{60} \\ = \frac{54}{60} \\ = \frac{9}{10}$