North Carolina Standards. A number line is a line that shows any group of numbers in their least to greatest value.

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NC.CC.4.NF. Number and Operations--Fractions

Build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers.

4.NF.3. Understand a fraction a/b with a > 1 as a sum of fractions 1/b.

4.NF.3.a. Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.

4.NF.4. Apply and extend previous understandings of multiplication to multiply a fraction by a whole number.

4.NF.4.a. Understand a fraction a/b as a multiple of 1/b. For example, use a visual fraction model to represent 5/4 as the product 5 x (1/4), recording the conclusion by the equation 5/4 = 5 x (1/4).