Unit 3, Lesson 6
Use Strategies and Algorithms to Add
Grade 3
Activity 1
Two methods of recording the addition of are shown.
Method 1
Method 2
- How is the newly composed ten and hundred recorded differently in each method?
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Try using the second method of recording to add these numbers:
Activity 2
Use a strategy of your choice to find the value of each sum. Show your reasoning. Organize your work so it can be followed by others.
Student Section Summary
We learned that an algorithm is a set of steps that works every time as long as the steps are carried out correctly. Then we learned algorithms to add numbers within 1,000.
We also learned that we can choose to add using a strategy or an algorithm, based on the numbers being added.