Ratios & Proportions

A ratio is

• comparing a bunch of numbers

• a comparison between 2 quantities

• an estimation of an amount

• a variable

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

A proportion is a

• ratio statement

• an "if-then" statement

• a statement of 2 ratios

• a comparison

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.3

All of the following are proper representations of a ratio EXCEPT

• a/b

• a to b

• a:b

• a over b

Tags

CCSS.6.RP.A.2

CCSS.6.RP.A.1

To solve for missing info in a proportion statement you must first

• Cross multiply

• Divide everything

• Get rid of variables

• Guess

Tags

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.B.7

CCSS.6.RP.A.2

CCSS.6.RP.A.3

In geometry what tends to happen to most problems

• they are hard to solve

• they turn in to decimals

• they become algebra problems

• they are easy to solve

Tags

CCSS.7.EE.B.3

CCSS.4.OA.A.3

CCSS.3.OA.D.8

Solve for x

 $\frac{3}{4}=\frac{x}{8}$  

Tags

CCSS.4.NF.A.1

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

Solve for a

 $\frac{a}{45}=\frac{3}{15}$  

Tags

CCSS.4.NF.A.1

CCSS.3.NF.A.3B

Solve for w

 $\frac{\left(w+2\right)}{5}=\frac{7}{5}$  

Tags

CCSS.7.NS.A.1D

Solve for y

 $\frac{\left(5+y\right)}{\left(y-3\right)}=\frac{14}{10}$  

Tags

CCSS.7.EE.B.3

Solve for m

 $\frac{\left(m+8\right)}{-3}=\frac{\left(17-m\right)}{-2}$  

Tags

CCSS.7.EE.B.3