1. One Step Equations with Addition and Subtraction

2. Warm Up Exercise 16 n when n = 8 6k when k = 3 3(n + 1) when n = 5
5a + 24 when a = 3
3b – 6 when b = 4

3. Warm Up Exercise 16 n when n = 8 2 6k when k = 3 3(n + 1) when n = 5
5a + 24 when a = 3
3b – 6 when b = 4

4. Warm Up Exercise 16 n when n = 8 2 6k when k = 3 18
5a + 24 when a = 3
3b – 6 when b = 4

5. Warm Up Exercise 16 n when n = 8 2 6k when k = 3 18
5a + 24 when a = 3
3b – 6 when b = 4

6. Warm Up Exercise 16 n when n = 8 2 6k when k = 3 18
5a + 24 when a = 3 39
3b – 6 when b = 4

7. Warm Up Exercise 16 n when n = 8 2 6k when k = 3 18
5a + 24 when a = 3 39
3b – 6 when b = 4 6

8. Homework Assignment
Complete one step equations independent practice assignment
Have progress grade sheet signed by parent and brought back on tomorrow

9. Unit 3 Test Results 1st Period – 61.45 68.39 2nd Period – 79.84 86.72
3rd Period –
4th Period –

10. One Step Equations
Real world math video:

11. Lesson Objective
Solve one step equations involving addition and subtraction

12. One Step Equations
An equation is a mathematical statement that two expressions are equal
A solution of the equation is a value of the variable that makes the equation true.
A one step equation is an equation in which you will only need to perform one step in order to solve the equation

13. One Step Equations
We solve one step equations by using the inverse operation
Inverse operations are operations that “undo” each other
For example, addition “undoes” subtraction and subtraction “undoes” addition.
Multiplication is the inverse of division

14. Solving One Step Equations using addition and subtraction
If a number has been added to the variable, subtract that number from both sides of the equation.
If a number has been subtracted from the variable, add that number to both sides of the equation.

15. Replace the variable with your answer.
Example 1: Solve m + 7 = 11
m + 7 = 11
To undo the addition of 7, subtract 7 from both sides of the equal sign.
m = 4
Check the solution.
m + 7 = 11
Replace the variable with your answer.
(4) + 7 = 11
11 = 11 

16.  +4 +4 10 = m 6 = m - 4 6 = 10 - 4 6 = 6 Example 2: Solve 6 = m - 4
To undo the subtraction of 4, add 4 to both sides of the equal sign.
10 = m
Check the solution.
6 = m - 4
Replace the variable with your answer.
6 = 
6 = 6

17. Practice 86 + y = 99 x – 11 = 9 q + 10 = 22 n + 3.5 = 6.7

18. Practice 86 + y = 99 y = 13 x – 11 = 9 q + 10 = 22 n + 3.5 = 6.7

19. Practice 86 + y = 99 y = 13 x – 11 = 9 x = 20 q + 10 = 22
n = 6.7
a – 1.5 = 4.2

20. Practice 86 + y = 99 y = 13 x – 11 = 9 x = 20 q + 10 = 22 q = 12
n = 6.7
a – 1.5 = 4.2

21. Practice 86 + y = 99 y = 13 x – 11 = 9 x = 20 q + 10 = 22 q = 12
n = 6.7 n = 3.2
a – 1.5 = 4.2

22. Practice 86 + y = 99 y = 13 x – 11 = 9 x = 20 q + 10 = 22 q = 12
n = 6.7 n = 3.2
a – 1.5 = 4.2 a = 5.7

23. One Step Equations
Study jams: