2.  We combine like terms in order to simplify expressions. Vocabulary: 1. Terms = sets of numbers and/or variables separated by addition and subtraction 2. Like = the same kind of term 3. To simplify = group together all terms that are the same and add or subtract them

3.  What are the different types of fruits in here and how many of each kind are there? 3 Apples 4 Oranges 1 Pineapple 2 Kiwi 3a + 4or + 1p + 2k Combine only the fruit that is the exact same.

4. Step 1: Change subtraction to addition Step 2: Circle all the variables that are the same (including their coefficient and sign) Step 3: Add or subtract the numbers. Repeat Ex: Combine Like Terms -9x² + 4x – 7x + 11x² -9x² + 4x + (- 7x) + 11x² 2x² + 4x + - 7x 2x² - 3x

5. Step 1: Change subtraction to addition Step 2: Circle all the variables that are the same (including their coefficient and sign) Step 3: Add or subtract the numbers. Repeat Ex: Combine Like Terms 5m + 9n– 8 + 6m –3n –1 5m + 9n+(- 8) + 6m +(-3n) +(-1) 11 m + 9n +(- 8) +(- 3n) + (-1) 11m + 6n +(- 8) + (-1) 11m + 6n - 9

6. 1) 5a – 3b + 8b - a2) 10x² + 5x – 4x² + 3x 4a + 5b 3) 4x + 3y – 2xy + 8y – 6xy4) -7z - 2y – 4z - 9y 4x + 11y – 8xy 5) 10x + 7y – 1 + 3y – 12x + 13 -2x + 10y + 12 6) 3a + 4b – 9a + 10 – 5c + 7 – 4b + 10a 4a –5c + 17 6x² + 8x -11z -11y