6.2.3Solve addition, subtraction, multiplication, and division problems, including those arising in concrete situations, that use positive and negative integers and combinations of these operations.

#### Example Problems

$$7-13=$$
$$-3-3=$$

$$4+ (-5) -(-7)-3=$$

#### Advice

Color code everything. Convert double negatives.

Who wins? By how much?
\(\require{color} \require{enclose}\)
$$4+(-5)-(-7)-3=$$
$$\color{blue}4+ \color{red}(-5) \color{blue}\enclose{horizontalstrike}{-(-}7)\color{red}-3\color{black}=$$
$$\color{blue}11\color{red}-8\color{black}=$$

#### Practice

Copyright (c) 2003-2012 F. Knauss