1. 2.2 Subtracting Rational Numbers

2. 2.2 – Subtracting Rational #s Goals / “I can…” Subtract rational numbers Apply subtraction

3. 2.2 – Subtracting Rational #s Example: Using a number line Yesterday when we added, we moved the line to the right. Today when we subtract we move it to the left.

4. 2.2 – Subtracting Rational #s Using your calculator, do the following problems: 5 + (-7) = 5 – 7 = -6 + (-3) = -6 – 3 = What conclusion can you make?

5. 2.2 – Subtracting Rational #s RULE: Add the opposite - to subtract a number, switch the subtraction sign to add and take the opposite of the next number

6. 2.2 – Subtracting Rational #s Example: -6 – 7 = 2.5 – (-7.6) =

7. 2.2 – Subtracting Rational #s How did we solve ?

8. 2.2 – Subtracting Rational #s What if we had more than one number in the absolute value? Treat them like parentheses.

9. 2.2 – Subtracting Rational #s Example: Simplify

10. 2.2 – Subtracting Rational #s Example: Evaluating Expressions Let x = -3 and y = -6 1. x – y 2. y – x 3. –x – y 4. –x – (-y)