Unit 8 - Lesson 5 - Grade 2: Illustrative Mathematics

How many do you see?

How do you see them?

What did you notice?

What do you wonder?

In the first column of your recording sheet, decide whether each student has an even or odd number of counters. Show your reasoning and circle your choice.

Complete the gray column. Does adding 1 change whether the number of counters is even or odd? Explain.

Complete the last column. Does adding 2 change whether the number of counters is even or odd? Explain.

Elena has 8 counters. Does she have an even or odd number of counters? Explain or show your reasoning.

Without adding, explain which one of these expressions represents an odd number.