This Problem Set is a part of the Lesson 24, Unit 2, Grade 1. In this lesson, students use various strategies to solve "take from with change unknown" problems. (For example, "There were 11 birds in a tree when I first looked at it. I looked away.
This Problem Set is a part of the Lesson 24, Unit 2, Grade 1. In this lesson, students use various strategies to solve "take from with change unknown" problems. (For example, "There were 11 birds in a tree when I first looked at it. I looked away.
