CCSS.Math.Content.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. CCSS.Math.Content.7.NS.A.1d Apply properties of operations as strategies to add and subtract rational numbers. CCSS.Math.Content.7.NS.A.3 Solve real-world and mathematical problems involving the four operations
