Sprint: Review of Subtraction in the Teens

This Fluency Activity is a part of the Lesson 14, Unit 3, Grade 2. In this lesson, students use place-value disks to represent numbers in two ways when there are more than 9 ones or 9 tens, e.g.,1 hundred 5 tens 2 ones and 15 tens 2 ones. Then they write the numbers in expanded, unit, standard, and word forms.