**New Mexico Education Standards**. A number line is a line that shows any group of numbers in their least to greatest value. Read More...

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NM.N. Number and Operations: Students will understand numerical concepts and mathematical operations.

K-4.N.1. Understand numbers, ways of representing numbers, relationships among numbers, and number systems.

4.N.1.1. Exhibit an understanding of the place-value structure of the base-ten number system by reading, modeling, writing, and interpreting whole numbers up to 100,000; compare and order the numbers:

4.N.1.1.b. Identify the numbers less than 0 by extending the number line and using negative numbers through familiar applications (e.g., temperature, money)

4.N.1.3. Add and subtract fractions with common and uncommon denominators using a variety of strategies (e.g., manipulatives, numbers, pictures):

4.N.1.3.b. Identify the numbers less than 0 by extending the number line and using negative numbers through familiar applications (e.g., temperature, money)