1.13 Additive inverses

NC.6.NS.9

Apply and extend previous understandings of addition and subtraction. a. Understand additive inverses when adding and subtracting integers.• Describe situations in which opposite quantities combine to make 0.• Understand � + � as the number located a distance q from p, in the positive or negative direction depending on the sign of q. Show that a number and its additive inverse create a zero pair.• Understand subtraction of integers as adding the additive inverse, � − � = � + (– �). Show that the distance between two integers on the number line is the absolute value of their difference.• Use models to add and subtract integers from -20 to 20 and describe real-world contexts using sums and differences.