Subtracting Equations
Subtraction Equations
Standard
6.N.12 Demonstrate an understanding of the inverse relationship of addition and subtraction, and use that understanding to simplify computation and solve problems.
6.P.2 Replace variables with given values and evaluate/simplify, e.g., 2() + 3 when = 4.
6.P.3 Use the properties of equality to solve
problems, e.g., if + 7 = 13, then =
13 – 7, therefore = 6; if 3 x = 15, then 1/3 x 3 x = 1/3 x 15,
therefore = 5.
Cluster
Objective
To find the value of a variable in a subtraction problem
Lesson
Use the inverse to solve for the variable
EX. y - 4 = 3
The inverse of - 4 is +4
So, y - 4 + 4 = 3 + 4. y = 7
Practice
If you need more practice, use the Online Tutorial that is used with our Text Book
Click on Learn the Lesson
