This Fluency Activity is a part of the Lesson 21, Unit 2, Grade 1. This fluency activity reviews subtracting 7, 8, and 9 using the Hide Zero cards, which helps prepare students to understand ten as a unit by the module's end.
This Fluency Activity is a part of the Lesson 21, Unit 2, Grade 1. This fluency activity reviews subtracting 7, 8, and 9 using the Hide Zero cards, which helps prepare students to understand ten as a unit by the module's end.
