## Reflection: Discourse and Questioning Keep it Simple - Section 4: Independent Practice

I was blown away by my extension group on the rug during the independent practice. They played the Grab It version using some really awesome math thinking and discussion.

One vignette I was really impressed by (and so sad I didn't get to make a video of!) was a little girl figuring out how to solve 32 + 32+ 20. She did all of this mentally and used some key math understandings to be able to do it!

Me: What friendly number sentence are you going to use?

Davy: 32 and 32.

Me: Show us how you can use 32 and 32 to help you solve.

Davy: 32 and 32 is...60...64.

Me: 32 and 32 is 64. Is 64 the answer?

Davy: No

Me: Why not?

Davy: I still have to add 20.32 and 32 is 64. 64 and 20 more is...60, 70, 80, 84.

This showed me so much about what she understands! She knew that she could separate the ones away from the problem for a minute to make it easier to solve, and then put them all back together. With 32+32, she knew she could do 30+30, then do 2 and 2, then put them all back together. With 64 and 20, she also showed that she understood how to separate the 4 ones and do 60+20, then put the 4 ones back on. This is an amazing example of advanced first grade number sense!

Whoa. Great student thinking!
Discourse and Questioning: Whoa. Great student thinking!

# Keep it Simple

Unit 10: Solving 3 Addend Problems
Lesson 3 of 8

## Big Idea: Introduce students to the concept of "simplifying" as they find the friendly number sentences that help them solve 3 addend number sentences!

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55 minutes

### Amanda Cole

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