Unit 2, Lesson 23

Solve add to with change unknown problems, relating varied addition and subtraction strategies.

EngageNY 60 min(s)
In this lesson, students use "counting on," "take from ten" strategies, or the "get to ten" strategy to solve "add to with change unknown" problems. (For example, "In the morning, there were 8 leaves on the floor under the ficus tree. During the day, more leaves fell on the floor. Now, there are 13 leaves on the floor.") The "get to ten" strategy has students solving 13 - 8 as 13 - 3 - 5, understanding that decomposing the subtrahend to easily get to the ten yields a simpler, more manageable subtraction problem.

You must log inorsign upif you want to:*

*Teacher Advisor is 100% free.

Teacher Advisor uses cookies and other tracking technologies for performance, analytics, and marketing purposes.

By using this website, you accept this use. Learn more about these technologies in the Privacy policy.

Download Chat? You can download the chat for future reference.
Delete Chat History? You can’t reverse this action.
Service is currently unavailable Please, try to reopen the chat window