# Math Terminology + Formulas

## What are equivalent fractions?

### Fractions equal to the same decimal

For example, 1/2 and 2/4 = 0.5## What is a most reduced fraction?

### The lowest equivalent fraction

1/2 is the most reduced form of 2/4 and 250/500## What is a common denominator?

### Same bottom numbers in fractions

2/4 and 3/4 have a common denominator## What does PEMDAS mean?

### Order of Operations

Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction## What symbol means * is *?

### =

The equal sign## What does * of * indicate in a word problem?

### Multiplication

## What is the formula for a percent increase?

(New Number — Original Number) ÷ (Original Number) x 100

## What is the formula for the area of a triangle?

½ (base) (height)

## What is the formula for circumference?

2

**πr**## What is the formula for the area a semicircle?

**½πr²**

## What the formula for speed?

Distance ÷ Time

## How many sides to a cube?

### 6

This helps you calculate surface area.## What does circumference measure?

### Perimeter of Circle

It’s the distance around a circle## What metric prefix means 100?

### Hecto

## What metric prefix means 0.1?

### Deci

## 1000% = 10

True or False?### True

If 1 = 100%, 10 = 1000%## 14% = 0.014

True or False?### False

14% = 0.14## How many inches are in a square foot?

### 144

12 inches in a foot, 12×12 = 144 = square inches in square foot# More Math Practice

## What is 14 percent of 90?

### 12.6

0.14 x 90 =12.6## What is 12 as a percentage?

### 1200%

Be sure you know the rules to convert decimals and percentages!## What is 200 percent of 7?

### 14

200% = 2 –> 2 x 7 =14## What is 0.06 as a most reduced fraction?

### 3/50

0.06 = 6/100 = 3/50## What is 1.38 as a percentage?

### 138%

If 1 = 100%, then 1.38 as a percentage must be bigger.## 80 percent of what number is 88?

### 110

0.8x = 88## 10 grams is how many kilograms?

### 0.01 kg

You’ll need to know metric prefixes on the TEAS.## 3x −10 = 89

*Solve for x*

### x = 33

Add 10 to both sides. Then, divide both sides by 3.3x −10 = 89

## 4 (12 + 7 × 2) − 8 × 3 = ?

### 80

Use PEMDAS to answer this question.4 (12 + 7 × 2) − 8 × 3 = ?

## What's the formula for the surface area of a cube?

### 6a²

*a*= area

## You have 4 sets of flashcards with 42 questions each. How many total questions are there?

### 168

Use multiplication in this question.## ½ ( 2² + 4 × 3 ) − 16 ÷ 2 = ?

### 1

Be sure to review PEMDAS rules.# Data Interpretation

## Which axis is for the dependent variable?

### X

You’ll see graphs in the math section.## Define the independent variable.

The independent variable is controlled and changed by the experimenter.

## What is covariance?

It’s the relationship between variables—how they change in relation to each other.

## When should you use a pie chart?

Pie charts are best for graphing proportions of a whole 100%

## When should you use a bar graph?

Bar graphs chart the specific amounts of different groups (for example, amount of students per grades 7-10).

## When should you use a scatter plot?

Scatter plots graph the relationship between 2 variables

## Which is the same as the average?

Mean, Median, Mode, or Range?### Mean

The mean is the average. You’ll need to know these terms for the TEAS.## How do you find the range?

Subtract the lowest number from the greatest number.

## How do you find the mode?

The mode is the value that appears the most.

## What is the mean?

2, 16, 5, 8, 4, 7### 7

Add the values (42) and divide by the number of values (6).## Which way would data skew if the mean is greater than the median?

### Right

You might be asked right/left*skew*on the TEAS.