﻿ Grade 7 Mathematics Module 2, Topic A, Lesson 5 | EngageNY

## Grade 7 Mathematics Module 2, Topic A, Lesson 5 Student Outcomes

• 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:  removing (subtracting) a positive card changes the score in the same way as adding a corresponding negative card.  Removing (subtracting) a negative card makes the same change as adding the corresponding positive card.
• Students justify the rule for subtraction for all rational numbers from the inverse relationship between addition and subtraction; i.e., subtracting a number and adding it back gets you back to where you started: (m - n) + n = m. Grade 7 Mathematics Module 2, Topic A, Lesson 5: Student Version (579.88 KB) View PDF Grade 7 Mathematics Module 2, Topic A, Lesson 5: Teacher Version (868.25 KB) View PDF Grade 7 Mathematics Module 2, Topic A, Lesson 5: Student Version (445.09 KB) Grade 7 Mathematics Module 2, Topic A, Lesson 5: Teacher Version (1.59 MB)