1. 1-3 Adding and Subtracting Integers Aim: How can we add and subtract integers and to solve problems involving integers? CCSS: 7.NS.1.d

2. Warm up: Quiz 1 (15 Min) Write an algebraic expression for each phrase 1. The product of -3 and a number s 2. A number v divided by 12 3. The quotient of a number m and 10 4. The sum of 4 and a number f Simplify each expression. 1. |-304| 2. |15| 3. 2 |8| 4. 6 - |-3| Evaluate each expression for the given values. 1. 3|c| for c = 3.5 2. |f g| for f = 4, g = 7 3. |x| + y for x = -4.2, and y =3 4. A mechanic charges $ 168 per parts and $35 per hour for labor. Write an expression for the total charge. Evaluate the expression to find the total charge for 3 hours of labor

3. Adding/Subtracting Integers Simplify: 1. 6 + (-15) = 2. -12 + 30 = 3. 12 – (-15) = 4. 15 – 12 = A football team’s movement on the field: If a team loses 9 yards and then gains 9 yards, it is back where it started: What happen??? -9 + 9 = 0 Two numbers whose sum is 0 are additive inverses.

4. Geography A group of archaeologists leaves a site in Jordan and descends 647 m to the shore of the Dead Sea. Their initial elevation was 251 m above sea level. What is the elevation of the Dead Sea?

5. Partner Work Vocabulary: How are whole numbers different from integers? Mental Math. Determine whether each expression equals a positive or a negative number. 1. 2 + (-6) 2. -1 + (-4) 3. -5 + 9 Simplify each expression. 1. 6 + 2 = 2. -8 + 3 = 3. -7 + 5 = 4. 4 – 1 = 5. 4 + (-3) = 6. -4 – 4 = Evaluate x + y – z for x =2, y = -2, and z =-3 Challenge: For what integer values x is | x + 1| -2 positive? Think, Pair, Share

6. Exit Ticket “ A Game” 1. Write two integers. 2. Exchange papers with partners who add the integers. 3. Then subtract the first integer from the second.