Commutative Property
Identity Property of Addition
Associative Property of Addition
addends
sum
round
ABOUT how many or how much.
Closest number ending with 0.
estimate
To give a number or answer that tells about how many or how much.
compatible numbers
Numbers that are easy to add, subtract, multiply, or divide mentally.
fact family
a group of related facts using the same numbers
difference
The answer to a subtraction problem.
equivalent
equal to
compute
expanded form
inverse operations
Two operations that are the opposite of each other.
compensation
adding and subtracting the same number to make the sum or difference easier to find
numerator
standard form
a way to write a number only showing its digits
Example: 385
denominator
word form
a number written in words
four thousand, six hundred, thirty two
base 10 place value
the value of the place a digit has in a number
digits
the symbols 0, 1, 2, 3, 4, 5, 6, 7, 8,and 9, used to write numbers
compare
to find out which number is greater and which number is less
ordinal number
a number used to show the order of people or objects
decimal point
a dot that separates dollars from cents and ones from tenths in a number
Example: $1.95, 1.9
integers
array
skip count
set
subset
whole numbers
no fraction, no decimals, no negatives
at least
as much as, equal to or greater than
at most
no more than, equal to or less than
factor
a whole number that multiplies with another number to make a third number
fraction
any part of a group, number or whole
Fractions have a numerator and a denominator
greater than
less than
mixed number
a whole number and a fraction
model
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multiplication
an mathematical operation where a number is added to itself several times
division
a math operation where a number is shared or grouped into equal parts
addition
a math operation where 2 or more groups are combined
45 + 13 = 58
subtraction
a math operation that takes one quantity away from another
63 - 19 = 44
number sentence
a mathematical sentence using symbols and numbers
an equation or a inequality with <, >, or =
2 + 3 = 5
1 + 3 > 2
8 - 2 < 7
place value
the value of a digit depending on its place in a number
reasonable
an answer that makes sense
regrouping
carrying in addition and borrowing in subtraction
sharing equally
fair share, dividing so that each group is equal
classify
to make a group based on similar characteristics
order
arranged according to size, amount or value
distributive property
6 x 27 =
breaking apart multiplication problems into similar problems