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Number Concepts
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Natural numbers elementary
Positive counting numbers: 1, 2, 3, ...
Counting
Number line with positive numbers
Numeration
Decimal numeration
Addition and subtraction of positive whole numbers
Multiplication and division of positive whole numbers
Exponents
Expressions
Order of operations
Evaluating expressions
Rounding and estimating
Integers
Positive and negative whole numbers and zero: ..., -3, -2, -1, 0, 1, 2, 3, ...
Negative numbers
Number line with negative numbers
Addition of positive and negative whole numbers
Subtraction of positive and negative whole numbers
Multiplication and division of positive and negative whole numbers