(12/1) Cross Multiply Practice

Solve for X

 $\frac{x}{2\ }$  =  $\frac{12}{8}$  

• 3

• 12

• 4

• 8

Tags

CCSS.4.NF.B.4C

CCSS.4.NF.B.4B

When cross multiplying to find x, describe what you should do to solve the problem.

• Multiply the top (numerator) and then multiply the bottom (denominator)

• Write out the problem, draw a line to connect the diagonal numbers and/or letters, then multiply the numbers/letters that are diagonal from each other and place an = sign in between. Solve for the letter (variable).

• I don't know, just tell me what to do!

• Simplify both fractions and take your BEST guess

Tags

CCSS.7.RP.A.3

 $\frac{x}{2}$   =   $\frac{9}{18}$  

Solve for X.

• 9

• 18

• 12

• 1

Tags

CCSS.7.RP.A.2B

Solve for y.
 $\frac{4}{12}$  =  $\frac{y}{9}$  

• 1

• 3

• 6

• 9

Tags

CCSS.7.RP.A.2B

 $\frac{x}{3}$   =   $\frac{3}{9}$  

Solve for x.

• 1

• 3

• 9

• 12

Tags

CCSS.7.RP.A.2B

 $\frac{3}{4}$   =   $\frac{6}{n}$  

Using this equation, how would you set up your cross multiplication?

• 3 x 6 = 4n

• 3n = 6 x 4

• 3n = 20

• 3 x 4 x 6 = n

Tags

CCSS.5.NF.B.5B

 $\frac{x}{25}$   =  $\frac{4}{4}$  

Solve for x.

• 1

• 25

• 4

• 100

Tags

CCSS.7.RP.A.2B

 $\frac{x}{10}$  =  $\frac{6}{4}$  

Solve for x.

• 15

• 60

• 30

• 12

Tags

CCSS.7.RP.A.2B

 $\frac{n}{10}$  =  $\frac{1}{4}$  

Solve for n.

• 1

• 4

• 2.5

• 10

Tags

CCSS.4.NF.A.1

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

 $\frac{y}{2}$  =  $\frac{5}{2}$  

Solve for y.

• 1

• 2

• 5

• 10

Tags

CCSS.7.RP.A.2B