Evaluate the following expressions.

1. $10 \frac { 7 } { 9 } + ( - 9 \frac { 2 } { 3 } )$ 

• Hint (a):

  Find a common denominator. Then this can be thought of a subtraction problem.

  Answer (a):

  $1\frac{1}{9}$

2. $- 10 \frac { 7 } { 10 } - 2 \frac { 3 } { 5 }$ 

• Hint (b):

  See hint (a) for help.

3. $( 4 \frac { 1 } { 2 } ) ( - 3 \frac { 3 } { 10 } )$ 

• Hint (c):

  Convert each mixed number to a fraction greater than one before multiplying.

4. $- 8 \frac { 3 } { 5 } \div 1 \frac { 1 } { 5 }$ 

• Answer (d):

  $-7\frac{1}{6}$