##### Created by:

sfainter  on January 29, 2011

##### Description:

Place Value, Addition, Subtraction, Multiplication, Division, Estimation, Comparing,Whole Numbers, Decimals, Fractions

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#### Definitions

addition the process of finding the total number of items when 2 or more sets are joined
ascending order the order of numbers or objects from least to greatest
associative property this is the property in which the same addends (or multiples) can be grouped in different ways and the sum (or product) will be the same
commutative property this is a property in which the order of two or more addends (or multiples) can be changed and the sum (or product) will be the same
compare to determine if two quantities are greater than, equal to, or less than each other
decimal part of a whole; shown with numbers and a decimal point
decimal point a point that separates whole numbers and decimal numbers
descending order refers to numbers or objects that are in order from greatest to least
difference the answer to a subtraction problem
digits the ten symbols used to write a number (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
dividend the number that is divided in a division problem
division a process of sharing a number of times to find how many groups can be made
divisor the number that divides the dividend
equal parts when a set or object is divided into the same parts
equal sign a symbol that shows two amounts have the same value
equation a number sentence that shows two quantities are equal (=)
equivalent sets that have the same value
estimate to find a number that is close to an exact amount; to give an approximate value rather than an exact answer
factor a number that is multiplied by another number to find a product
greater than the symbol >; shows the first set is larger than the second set; also more than
inverse operations operations that undo each other; addition and subtraction; multiplication and division
less than the symbol <; shows the first set is smaller than the second set; also fewer
minus the symbol - ; shows subtraction
multiple a product of a whole number and another whole number
multiplication the process of finding the total numbers of objects in equal-sized groups
period A group/family of 3 digits in a number; separated by commas starting from the right
place value the position of a digit in a number that is used to determine the value of the digit
plus the symbol +; shows addition
product the result of multiplying two numbers
quotient the answer in a division problem
regrouping the name for the process of exchanging amounts equal in value to rename a number
remainder the left over amount when a number cannot be divided equally
round to increase or decrease a number to the nearest ten; a process that tells which multiple of 10; 100; 1000; etc. a number is closest to
subtraction the process of taking away objects from a group
standard form the form of a number written with commas separating groups of 3 digits starting from the right;
Ex. 345, 720
word form The form of a number written in words using place value
Ex. three hundred forty-five thousand, seven hundred twenty
expanded form Thee form of a number that shows the value of each digit;
Ex. 300,000+40,000+5,000+700+20+5
minuend The number being subtracted from
subtrahend the number being subtracted from the minuend
Identity Property of Addition The property that states: the sum of any number & zero is that number; n + 0 = n
Identity Property of Multiplication The property that states: the product of any number & one is that number; n x 1 = n
underestimate The result of using smaller numbers to estimate a sum or product. The estimate is smaller than the actual answer.
overestimate The result of using larger numbers to estimate a sum or product. The estimate is larger than the actual answer.
Commutative Property of Multiplication The order of factors can be changed and the product remains the same. 3x5=5x3
Commutative Property of Addition The order of addends can be changed & the sum remains the same. 3+7=7+3
Associative Property of Multiplication Factors can be regrouped & the product remains the same.
Associative Property of Addition Addends can be regrouped & the sum remains the same.
Zero Property of Multiplication In multiplication, the product of a number & 0 is 0.Ex. 8 x 0 = 0
equivalent decimals Decimals which name the same amount.
equivalent fractions Fractions that name the same part of a whole region
tenth one part in 10 equal parts
hundredth one part in 100 equal parts
...its right Each place is 10 times the value of the place to ____
exact the actual, precise number (sum, difference, product,quotient); not an estimate
pattern A series of numbers or figures that follow a rule
reasonableness when an answer makes sense
front-end estimation A method of estimating by changing numbers to the place-value of their front-digit & then finding the sum or difference
variable the name for a letter or symbol that stands for a number or set of numbers
algebraic expression a number sentence that includes a variable (no =)
evaluate to find the value of a numerical or algebraic expression
even numbers any number that can be evenly divided by two
odd number a number that cannot be evenly divided by two

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