Some of the questions are pretty simple, but hey, after all those Algebra, Geometry, etc., does anyone really remember how to add fractions that don't involve x?

### What is a prime number?

A prime number is a whole number that has two distinct factors, 1 and itself.

### How do you rewrite a number using prime factorization?

Write that number as a product of prime numbers.

### When is a Fraction Simplified?

A fraction is simplified if the numerator and denominator do not have any common factors other than 1.

### How do you multiply fractions?

When multiplying fractions, multiply the numerators together to get the product's numerator and multiply the denominators together to get the product's denominator. Reduce.

### What is a reciprocal?

You flip the number upside down. The numerator becomes the denominator and vice versa.

### How do you divide fractions?

Rewrite it as multiplication of the reciprocal and then proceed with the multiplication. Reduce.

### How do you add or subtract fractions with common denominators?

Combine the numerators together. Put the sum or difference found in step 1 over the common denominator. Reduce to lowest terms

### What is a Least Common Denominator (LCD)?

The LCD is the smallest number divisible by all the denominators.

### What is an Equivalent Fractions?

Equivalent fractions are fractions that look different but have the same value.

### How do you rewrite a mixed fraction?

Multiplying the denominator times the whole number and then add it to the numerator. Then, place this number over the existing denominator.

### How do you add or subtract fractions without a common denominator?

Find the Least Common Denominator (LCD) for all denominators. Rewrite fractions into equivalent fractions with the common denominator. Add and subtract the fractions with common denominators

### If the number with the larger absolute value was positive, is the sum positive or negative?

Positive

### When you are going from percent to decimal, drop the percent sign and then move your decimal ____ places to the ____.

two, left

### When you are going from decimal to percent, move your decimal place ____ to the ____ and then put a __ sign at the end of the number

two, right, %

### We are looking for a number that is 45% of 125. How do we find it?

Let X represent the number we want to find.

X=.45(125)

Solve

### The number 5.25 is what percent of 35? How do we find the percent?

Let X represent the number we want to find.

5.25 = 35x

Solve

### 32 is 40% of what number? How do we find the number?

Let X represent the number we want to find.

32 = .40x

Solve

### What is the mean of a list of values?

The median of a list of values is the middle value compared to the other values.

### What is the mode of a list of values?

The mode of a list of values is the value that occurs the most often.

### What is the range of a set of numerical data points?

The range of a set of numerical data points is the difference between the largest value and the smallest value.

### What is the standard deviation?

The standard deviation is a relative measure of the dispersion of a set of data.

### How do you find the standard deviation?

Step 1: Find the mean of the values of the data set.

Step 2: Find the difference between the mean and each separate value of the data set.

Step 3: Square each difference found in step 2.

Step 4: Add up all of the squared values found in step 3.

Step 5: Divide the sum found in step 4 by the number of data values in the set.

Step 6: Find the nonnegative square root of the quotient found in step 5.