1. Key Vocabulary: Opposites – pairs of positive and negative integers whose sum equals 0 Additive inverses – numbers and their opposites 2.2 Adding and Subtracting Rational Numbers Students will add and subtract integers and rational numbers Designed by Skip Tyler, Edited by Diane Warren

2. Find the sum. 1) -2.304 + (-0.26) Line up the decimals and add (same signs). -2.564 2) Get a common denominator and subtract.

3. Find the difference. 3) Change subtraction to adding the opposite. Get a common denominator. Subtract and keep sign of the larger number.

4. Find the difference. 4) Get a common denominator and subtract. Change subtraction to adding the opposite.

5. Substitute for y: 6.32 - (-3.42) 6.32 + 3.42 9.74 5) Solve 6.32 – y if y = -3.42

6. Find the solution 6.5 – 9.3 = ? Answer Now 1.-3.2 2.-2.8 3.2.8 4.3.2

7. Find the solution Answer Now 1.. 2. 3. 4.

8. A rational number is a number that can be written as a fraction. How can these be written as a fraction? 3 =

9. Inequality Symbols

10. Ordering Rational Numbers 2 ways to order from least to greatest 1.Get a common denominator 2.Change the fractions to decimals (numerator  demoninator)

11. Which rational number is bigger? 1) Get a common denominator. 2) or convert the fraction to a decimal. 0.363 < 0.375 4 11 < 3 8

12. Which rational number is bigger? 1)Get a common denominator 2)or convert to a decimal 1.75 < 1.83 7 4 or 11 6 42 24 < 44 24

13. Which symbol makes this true? 5 7 __ 3 4 1.< 2.> 3.= Answer Now

14. Which symbol makes this true? -2 9 __ 4 1.< 2.> 3.= Answer Now