Transcript One-Step Addition and Subtraction Equations

One-Step Addition and
Subtraction Equations
We are learning to…use inverse operations
to solve for a variable in an equation.
Monday, April 11, 2016
Take the following Algebra Tiles out
of your bag!
Trace each of these Algebra Tiles on your notes.
Name each tile by its area.
y units
x units
1 unit
1 unit
1 unit
1 unit
Area/Name:
Area/Name:
Area/Name:
Area/Name:
“1 UNIT TILE”
“-1 UNIT TILE”
“X TILE”
“Y UNIT TILE”
One-Step Addition and Subtraction
Equations
 The variables, x and y, represent
missing values in our equations
today.
 Our job is to find the value of the
variable by isolating the variable on
one side of the equation.
Example #1
x 5 8
=
Record your steps
mathematically:
x 5 8
x 55  85
x3
Check your Solution:
3 5  8
88
Example #2
y 3  6
=
Record your steps
mathematically:
y 3  6
y 33  63
y9
Check your Solution:
93  6
66
Example #3
x  (2)  5
Record your steps
mathematically:
x  (2)  5
x  (2)  2  5  2
=
x  3
Check your Solution:
3  (2)  5
5  5
Example #4
y  5  4
=
Record your steps
mathematically:
y  5  4
y  5  5  4  5
y 1
Check your Solution:
1  5  4
4  4