Parts of an Expression
What is the difference between an expression and an equation?
Term
Simplify
4x + 2x
6x
19t - 7t
12t
3/4x - 1/4x
1/2x (2/4x)
What operation does "combine" represent?
Addition
Each expression has multiple letters or numbers in it. These letters or numbers are called:
terms
Simplify
6a + 4b + 2b + 3a
9a + 6b
4r - 3b + 8r + 2b
12r + b
9.5u + 13 + 1.2a - 3.5u + 2
6u + 15 + 1.2a
Demonstrate how to box and/or group like terms in this expression:
2x + 3y - 8 + 5x + 4 - y
Signs must be included in the boxes/shapes
Or if grouping, signs must be included with the terms
If I am able to combine two terms, those terms are considered "_______" terms.
Like
Simplify
20m + 3 + 13b + 4a + 6
20m + 9 + 13b + 4a
a + 4c - 2b + 6a - c +3
7a + 3c - 2b +3
1/3x + 7/3k - 4/5x + 8 - 1/3k
-7/15x + 2k(6/3k) + 8
Identify the following parts of an expression using the expression 2y + 3 - y
Variable, Coefficient, Constant, Like terms, Operations
Term:
Variables:
Coefficient:
Constant:
Like terms
Operations
The official name for the letter in an expression is:
Variable
Simplify
9a + 3b + 2a + 7 + a + 9
12a + 3b + 16
15j - 14 + 8y - 9j - j + 3 -2y + a
5j - 11 + 6y + 3 + a
6x - 3/4x + 6 7y + 2y
5 1/4x + 6 + 9y
What property tells us that we can rearrange the terms in an addition equation and it will still equal the same amount?
Commutative property of addition
What is the official name of the number that is multiplying the variable in an expression?
Coefficient
Simplify
2f + 6y + 9k + 14 3k + y + 4f + 2
6f + 7y + 12k + 16
Simplify
4x - 3r + 7 -9r - 15 + 7j - 2x + x -12 + y + j - x + 2t
2x -12r -27 + 7 + 8j + y + 2t
Create your own expression using at least 3 variables, at least 1 pair of like terms, and at least 1 number.
Write your expression on the board and then solve it, explaining the steps.
TBD
Which class period is Mrs. Adams' Favorite?
This one!