ObjectiveAdd and subtract positive and negative rational numbers.
Use number lines to model addition and subtraction as a movement or distance between rational numbers. |
VocabularyNone
|
Essential Understanding
Adding and subtracting integers is related to adding and subtracting other rational numbers.
Standards7.NS.A.1b Understand p + q as the number located a distance |q| from p, in the positive or negative direction depending on whether q is positive or negative. Show that a number and its opposite have a sum of 0 (are additive inverses). Interpret sums of rational numbers by describing real-world contexts.
7.NS.A.1c Understand subtraction of rational numbers as adding the additive inverse, p – q = p + (–q). Show that the distance between two rational numbers on the number line is the absolute value of their difference, and apply this principle in real-world contexts. 7.NS.A.1d Apply properties of operations as strategies to add and subtract rational numbers. |
Mathematical PracticesMP.2, MP.3, MP.4, MP.7, MP.8
|