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# Unit 4

### Extending Decimals

TermDefinition
Counting (natural) Numbers the set of positive number numbers that begins at one and increases by increments of each time {1, 2, 3..., n}
Expanded Form the representation of a number as a sum of place values . Ex: 985.8 = 900 + 80 + 5 + .9
Expanded Notation the representation of a number as a sum of place values where each term is shown as a digit times its place value. Ex: 985.8 = 9 x 100 + 8 x 10 + 5 x 1 + 8 x 1/10
Numeral a symbol used to represent a number
Place Value the value of a digit as determined by its location in a number, such as ones, tens, hundreds, one thousands, ten thousands, etc.
Rounding a method for estimating a number by increasing or retaining a specific place value digit according to specific rules and changing all trailing digits to zero.
Standard Form the representation of a number using digits
Whole numbers the set of counting (natural) numbers including zero {0, 1, 2, 3....n}
Word Form the representation of a number using written words
Compatible Numbers numbers that are slightly adjusted to create groups of numbers that are easy to compute mentally
Created by: lozuna

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