Simplify each expression below without using a calculator.

1.  $8+(−6)+4$

   Hint (a):

   Refer to problem 2-132 or a similar problem for help.

2.  $−15+3+6$

   Answer (b):

   $−6$

3.  $−8+12−2$

   Answer (c):

   $2$

4.  $6(−8)$

   Hint (d):

   $6\left(8\right) = 48$

5.  $5(−9)$

   Answer (e):

   $−45$

6.  $−61−(−13)$

   Hint (f):

   This is the same as $−61 + 13$. Can you explain why?

7.  $4\left(−7\right)$

   Answer (g):

   $−28$

8. $120 ÷ \left(−10\right)$

   Answer (h):

   $−12$