Students understand the relationships of operations and use them to generate equivalent expressions. By this time, students have had ample experience with the four operations since they have worked with them from kindergarten through Grade 5.
The topic opens with the opportunity to clarify those relationships, providing students with the knowledge to build and evaluate identities that are important for solving equations. In this topic, students discover and work with the following identities:
w - x + x = w
w + x - x = w
a divided by b times b = a
a times b divided by b = a (when b ≠ 0)
3x = x + x + x
If 12 divided x = 4
Then 12 - x - x - x - x = 0.
There may be cases when our downloadable resources contain hyperlinks to other websites. These hyperlinks lead to websites published or operated by third parties. UnboundEd and EngageNY are not responsible for the content, availability, or privacy policies of these websites.