Solving Equations with Adding/Subtraction
Presentation
•
Mathematics
•
7th Grade
•
Medium
Seth Holden
Used 9+ times
FREE Resource
8 Slides • 18 Questions
1
CH 3.3
2
Two equations that have the same solution.
5 = 5
2 + 1 = 1 + 2
3 + 7 = 5 + 5
3
Addition/Subtraction Property of Equality
Adding/Subtracting the same numbers to each side of an equation produces an equivalent equation.
a = b then, a + c = b + c
a = b then, a - c = b - c
4
Multiple Choice
If a = b, would they be equivalent if you add 8 to both sides?
a + 8 = b + 8
Yes
No
Depends on what a and b equals
If a is negative
5
Addition and subtraction are inverse operations.
6
Multiple Choice
What is the inverse of addition?
Division
Multiplication
Subtraction
Exponent
7
Multiple Choice
What is another word for inverse?
Difference
Opposite
Variable
Quotient
8
To solve an equation, you must isolate the variable using inverse operations on both sides of the equation.
x + 4 = 12
9
10
Multiple Choice
What does the word isolate mean?
To complete
To turn into a fraction
To add or subtract
To get by itself
11
Multiple Choice
When solving an equation, what do you want to do to the variable?
Add it to the constant
Isolate it
Eliminate it
Substitute a random value for it
12
Fill in the Blanks
Solve.
g - 3 = 9
Type answer...
13
Multiple Choice
Solve.
h + 2 = 6
3
4
8
12
14
Multiple Choice
Solve.
x - 5 = -9
-4
-14
4
14
15
Multiple Choice
Solve.
w + 13.2 = 10.4
-2.8
23.6
-3.2
4.2
16
6 - x = 12
10 - p = -8
17
Multiple Choice
Solve.
4 - x = 5
9
1
-1
20
18
Multiple Choice
Solve.
10 - m = -10
20
0
-20
1
19
27 is 12 more than a number x.
The difference of a number p and -9 is 12
20
Multiple Choice
What word can I look out for the would mean equals?
is
sum
difference
product
21
Multiple Select
Choose all the words that could refer to an addition problem.
sum
total
difference
combined
22
Multiple Choice
What equation represents the word problem?
The difference between the numbers p and 3 is 10.
p - 3 = 10
10 - 3 = p
10 - p = 3
10 - 3p
23
Multiple Choice
What equation represents the word problem?
The sum of a number x and 8 is 12.
x + 8 = 12
12 + 8 = x
12 + x = 8
x + 12 + 8
24
Multiple Choice
Solve.
16 is 12 more than a number x
4
28
-4
6
25
Multiple Choice
Solve.
35 less than a number m is - 72
-37
-107
35
107
26
Poll
How comfortable are you with solving equations with addition and subtraction?
Not at all
A little
Good so far
I could take a quiz right now
CH 3.3
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