Lesson 17 Center Day 3

• Let’s add and subtract 3-digit numbers.

Warm-up Number Talk: Simplify It

Find the value of each expression mentally.

Activity 1 Introduce Target Numbers, Add Hundreds, Tens, or Ones

We are going to learn a new way to play the Target Numbers center.

Activity 2 More Target Numbers and Choice Time

Choose a center.

Target Numbers

Five in a Row: Addition and Subtraction

How Close?