addition- the process of adding two numbers to get their sum
difference- the difference between two numbers is what you get when you subtract one from the other
division- a basic arithmetical operation determining how many times one quantity is contained within another
estimate- a rough guess at the value of a number
interval- in math, the space or distance between numbers
multiplication- the basic arithmetic operation of repeated addition
number line- a line on which each point represents a real number
place value- within a number, each digit is given a place value depending on it's location within the number
product- the result of multiplying two numbers
remainder- the number left over when one number is divided by another
subtraction- a basic operation of arithmetic in which you take away one number from another
sum- the result of addition
digit- in the decimal system, one of the numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
period- each group of three digits in a series of numbers, starting from right to left
rounding- the process of approximating a number to a nearby one
comparing- to note the similarity or dissimilarity between two numbers
add- combine quantities, find a total
subtract- find a difference, take away a quantity, "how much left", "how much is left"
multiply- to put together a number of equal amounts to find a total, add the same number repeatedly
divide- to put together a number of equal amounts to find a total, Add the same number repeatedly
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