Addend  the numbers in a addition problem to be added together
Addition  the action of joining numbers together
Associative Property  regrouping addends or factors will not impact to total.
Commutative Property  changing the order of addends or factors does not change the total.
Difference  the answer to a subtraction problem
Digit  a numeric symbol that is used to represent numbers
Estimate  an approximate total
Equal  having the same value or being the same size
Identity Property  the value of a factor does not change when multiplied by 1, nor does an addend when zero is added.
Inverse operation  the opposite
Minuend  the number in which another number is subtracted from
More  a greater value or larger size
Multiples of 10 and 100  when a number is multiplied by 10 or 100
Number line  a line in which the numbers mark intervals
Operation  addition, subtraction, multiplication, and division
Place value  the value of a digit based on it's position in a number

Standard algorithm  the traditional method of computing numbers
Subtraction  the action of taking the value of one number away from another
Subtrahend  the number to be subracted in a problem
Sum  the answer to an addition problem
Capacity  the amount of liquid an object and hold
Gram  metric unit of mass (weight)
Elapsed time  the amount of time that has passed.
Height  the quality of being tall
Kilogram  a metric unit of mass (weight) 1,ooo grams
Liter  metric unit of capacity (volume)
Mass  weight
Measure  a standard unit used to express the size, amount, or degree of something.
Milliliter  metric unit of capacity (volume) 1/1000 of a liter
Minutes  measurement of time 60 seconds
Perimeter  the distance around the outside of an object
Scale  the intervals in which a bar graph is labeled or the value of the image on a pictograph.
Standard unit  an established common unit (ie: foot, inch, cm)
