Rounding/Addition Vocabulary: 3.NBT.1 3.NBT.2

The value of a digit depending on its place in a number.

• place value

• place value chart

• Number line

• Round

A chart assigning values of digits based on their location within a number.

• Place Value

• Place Value Chart

• Number Line

• Round

A line on which numbers are marked at intervals, with increasing values from left to right, used to represent numbers and to support reasoning about them.

• Number line

• Place Value

• Round

• Place Value Chart

To find a number that is close in value to the given number by finding the nearest ten, hundred, or another place value.

• Place Value

• Place Value Chart

• Number Line

• Round

If adding three or more addends the grouping can be changed, and the answer is the same.

I always have parenthesis

• Associative Property of Addition

• Commutative Property of Addition

• Identity Property of Addition

When values are added, the order can be changed, and the answer is the same.

I never have Parenthesis

• Associative Property of Addition

• Commutative Property of Addition

• Identity Property of Addition

The sum of any number and zero is the original number.

• Associative Property of Addition

• Commutative Property of Addition

• Identity Property of Addition

Numbers added together to get a sum.

• Addends

• Sum

• Regroup

The answer when adding numbers.

• addends

• sum

• regroup

The act of exchanging a number for an equal value in a different form.

• addends

• sum

• Regroup