Question

Rational numbers Add: 7/-18 + 5/-12 + -9/-16​

Answer 1

solution:

           $=\frac{7}{-18}-\frac{5}{12}-\frac{9}{16}\\\\\\LCM=144\\\\= \frac{7X8}{-18X8}-\frac{5X12}{12X12}-\frac{9X9}{16X9}\\ \\=\frac{56}{-144}-\frac{60}{144}-\frac{81}{144} \\\\=\frac{-56-60-81}{144} \\\\=\frac{-197}{144}$