1. Objective: Students will learn how to add integers.
September 29, Math 102
Objective: Students will learn how to add integers.
Aim: How do number lines help us to add integers?
NYS Mathematics Standards: 7.N.12
Prior Knowledge: Find each sum:
5 + 7 = ____ = ____
= ____ = ____

2. Mini-lesson:
To add positive numbers on a number line, begin at the first number. Move right the same number of spaces as the second number.
To add negative numbers on a number line, begin at the first number. Move left the same number of spaces as the second number.
Ex (-3)
Start here, then move LEFT 3 units…

3. Find the sum of -1 and 3. Use a number line. Graph the first number.
Guided Practice:
Find the sum of -1 and 3. Use a number line.
Graph the first number.
Start at -1
Since 3 is a positive integer, move right 3 units.
Start here, then move to the RIGHT 3 units…
Write the Sum = 2

4. Independent Practice:
Complete Exercises 23, 26, 30, 34, 35
Mr. Brooks will visit each desk, review your work, and answer any questions you may have.
Group Activity (Lesson Extension):
(Mr. Brooks will hand out red and yellow counters)
Find the sum of 2 and -6. Use counters.
Write the addition expression 2 + (-6).
Use 2 positive (yellow) counters to represent the first number.
Use 6 negative (red) counters to represent the second number.
You can make 2 zero pairs (1 red and 1 yellow cancel each other out).
There are 4 negative counters left.
Write the difference (-6) = -4

5. Assessment: Which are correct? If not, why not?
= -11 ___________
The number line shows = 3 _______
3. The sum of -6 and -9 is -15 ________
Homework:
8-1 Skills Practice worksheet