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.
Five in a Row: Addition and Subtraction