Solve Proportions Cross Multiply

What is the new equation after you cross multiply?

• 25x

• 4/25

What is the value of x ?

• x = 25/4

• x = 25

• x = 4/25

• x = 4

What is NOT a correct way to find the missing number?

• Check for a multiplication or division relationship

• Use Cross Products (cross multiply)

• Divide the top and bottom by the same number to simplify 3/12

• Typing the two fractions into the calculator and letting it do the math

What is the missing number for this proportion?

• 1

• 3

• 9

Using your equation from before, what is q ?

• q = 2

• q = 9

• q = 9/2

• q = 2/9

To solve a proportion, you

• cross simpify

• cross multiply

• cross divide

Determine whether each pair of ratios forms a proportion

• Proportion

• Not a Proportion

What are the two strategies that can be used to solve a proportion?

• Number Sense

• Create Exponents

• Cross Multiply, Divide

• Cross Divide, Multiply

What is pictured?

• Cross multiplying, then dividing

• Cross dividing, then multiplying

What is pictured?

• Solving a proportion by cross-multiply divide

• Solving a proportion using number sense