This Fluency Activity is a part of the Lesson 8, Unit 3, Grade 2. Let's play Mixed Counting using what we know about counting by ones, tens, and hundreds. I'll hold bundles to show you what to count by. A bundle of 100 means count by hundreds, a bundle of 10 means count by tens, and a single stick means count by ones. Let's start at 1,000 and count down.