Question

-6/7+-5/6+-4/9+-15/7

Answer 1

-6/7+(-5/6)+(-4/9)+(-15/7)
= -6/7-5/6-4/9-15/7
= -77/18

Answer 2

Answer

=-6/7+(-5/6)+(-4/9)+(-15/7)

={(-6×6)+(-5×7)/42}+(-4/9)+(-15/7)

={-36-35/42}+(-4/9)+(-15/7)

= -71/42+(-4/9)+(-15/7)

= {(-71×3)+(-4×14)/126}+(-15/7)

= {-213-56/136}+(-15/7)

= -269-170/126

= -539/126