This Fluency Activity is a part of the Lesson 14, Unit 4, Grade 2. This fluency activity helps students know when and when not to unbundle a ten when subtracting. This is a foundational skill for today's lesson. For every number sentence I say, you tell me if I take from the tens or the ones. If I say 46 - 5, you say take from the ones. If I say 46 - 7, you say take from the tens.