Unit 2, Lesson 5# Understanding Subtraction of Integers and Other Rational Numbers

EngageNY 45 min(s)

Students justify the rule for subtraction: Subtracting a number is the same as adding its opposite. Students relate the rule for subtraction to the Integer Game. Students justify the rule for subtraction for all rational numbers from the inverse relationship between addition and subtraction; that is, subtracting a number and adding it back gets you back to where you started.