Chapter 3 Place Value Lesson 22

What do 2+3= and 3+2= have in common?

What is different about them?

What do 2+1= and 1+2= have in common?

What is different about them?

1. The order of the addends

Do you see a common pattern?

What number comes in between 27 and 29?

What is the most organized or efficient way to expand 37?

What is the most organized or efficient way to count objects?

How many tens do we have?

How many ones do we have?

What number represents 2 tens and 8 ones?

How many ones are represented by 2 tens?

What is the value of 8 ones?

How many tens?

How many ones?

How many tens?

How many ones?

How many robot books does each boy have?

Who has the most books?

How do you know?

How does 5 compare to 7?