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15 Cards in this Set

  • Front
  • Back
variable
a letter used to represent a number
zero property of additon
if you add zero to any number the sum is that number 7+0=7
parenthesis
( )
in math means do what is inside these first
commutative property of addition
the quality of additon that states that the order of the addends does not change the sum

3+4=4+3
number sentence
a statement showing how nbumbers in an operation are related.
addends
numbers that you add in addition
estimate
adding or subtracting rounded numbers
sum
answer in addition
open sentence
a number sentence that contains a variable
x+6=10
difference
answer in subtraction
rounding
changing the number to the nearest 10, 100, 1000, etc
inverse operation
the opposite operation:
the opposite of addition is subtraction
algebra
an area of math that uses variables or letters to represent numbers
inverse of addition
subtraction
associative property of addition
the property of addition that states that the way you group the addends does not change the sum
1+(2=3)=(1+2)+3