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Level 17

Adding & Subtracting Whole Numbers


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add
two combine, put together two or more quantities
ADDEND
any number being added
associative property of addition
When the grouping of terms changes, the sum stays the same.
COMMUNICATIVE PROPERTY OF ADDITION
changing the order of the addends does not change the sum
COMPARISON BARS
used to represent larger & smaller amounts in a comparison situation
decimal
a number with one or more digits to the right of the decimal point
DECIMAL POINT
a dot separating the whole number from the fractions in decimals
Decompose
to separate into components or basic elements
difference
the answer to a subtraction problem
equal
having the same value
Equation
A mathematical sentence that contains an equals sign
Identity Property of Addition
The sum of 0 and any number is that number.
REGROUP
to rearrange the formation of a group
SUBTRACT
an operation that gives the difference between two numbers
sum
the answer to an addition problem
WHOLE
all of an object, group of objects, shape, or quantity