This Fluency Activity is a part of the Lesson 28, Unit 4, Grade 2. This fluency activity helps students know when to unbundle a ten to subtract. This is a foundational skill for the lesson. For every number sentence I say, you tell me if I take from the tens or the ones. When I say 46 - 5, you say take from the ones, but if I say 46 - 7, you say take from the tens.