1. Chapter 1 Sections 1-5 and 1-6 I Can... Use rules to add and subtract integers. Identify and combine like terms. HW: Instructional Fair (Prealgebra) W.S. 63 – Combine Like Terms, 1-10.

2. Addition/Subtraction Rules Adding Integers with the same sign, add the bases and use the sign of the largest base. Adding Integers with different signs, subtract the bases and use the sign of the largest base.

3. Addition Zero Player 1: Hand 1 25 2 + -5 = -3 Player 2: Hand 1 13 -1 + -3 = -4 Player 1: Hand 2 Player 1Player 2 68 Player 2: Hand 2 710 8 + -6 = 210 + -7 = 3

4. Like Terms Like Terms have the same variables to the same powers. Determine if the following are like terms: 1.2x and 3x 2.2x 2 y and 3xy 2 YesNo Yes 3. 3x 2 y 3 and 5x 2 y 3 No

5. Combine Like Terms How Many in Each Suit? 9D + 1H + 1D + 8C + 1S + 5D = 15D + 1H + 8C + 1S

6. Modeling Integers Algebra tiles x2x2 -x 2 x-x1

7. Combine Like Terms Use the algebra tiles to write the following expressions: 2x -3x + 2 x 2 + 2x + -3

8. Combine Like Terms Use the algebra tiles to write the following expressions. Simplify by combining like terms. 2x + 3 - 3x - 4means 2x + 3 + -3x + -4 -1x + -1 or -x - 1

9. Student Practice Problems Combine Like Terms for the following expressions: 1.3x - 7 + 4x + 8 2.5x + 6 – 7x – (-7) 3. 4 – 3x - 2x - 5 means 3x + -7 + 4x + 8= 7x + 1 means 5x + 6 + -7x + 7= -2x + 13 means 4 + -3x + -2x + -5= -5x +-1

10. Conclusion In your spiral, without looking at your notes, write the definition of like terms. Share your definition with your partner. Like Terms: Terms with the same variable to the same power