Explain to me the rule of pemdas in order of operations.

Parenthesis
exponents
multiplication/division
addition/subtraction

when given a math problem you must go through these operations from top to bottom to recieve the correct answer

Hi There!

PEMDAS is a term in math in order of operations. 

Here is what this means
Paranthesis
exponents
multiplication/division (left to right)
addition/subtraction (left to right)

In order of operations, you use pemdas in order so the P, would come first, E second, and so on.

Example 1: (10+9)-1, in this example, since parenthesis is first you would solve 10+9=19 and then you would subtract that by one 19-1=18

In conclusion this is the rule of pemdas.

Hope this helps :)

Ido not know i use to

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.