### Standard Alignments:

(C) Represent integer operations with concrete models and connect the actions with the models to standardized algorithms

6.3.D(D) Add, subtract, multiply, and divide integers fluently

7.NS.1 Apply and extend previous understandings of addition and subtraction to add and subtract rational numbers; represent addition and subtraction on a horizontal or vertical number line diagram.

7.NS.1.D7.NS.1.D Apply properties of operations as strategies to add and subtract rational numbers.