Proportions
1/4 = 2/8
Proportional
Show me what an equation looks like. Write your own.
Any equation
How do we find out if fractions are proportional?
Find the Cross Products
What does it mean if fractions are proportional?
The are the same or equal each other.
3/4 = 4/5
Not Proportional
x -2 = 5
7
What equation would you get from 3/x = 3/8
3x = 24
What is a variable?
A placeholder or math symbol
5/9 = 2/7
Not Proportional
x + 19 = 39
20
Solve for x: 3/x = 3/8
8
What does inverse mean?
Opposite
12/24 = 8/16
19x = 95
5
Solve for x: 2/6 = 10/x
30
What are operations?
addition, subtraction, multiplication, division
100/300 = 300/900
Proportional
14/x = 7
2
Solve for x: 10/70 = 5/x
35
Give me all of the operations and their inverses.
addition is the opposite of subtraction
multiplication is the opposite of division