This Problem Set is a part of the Lesson 30, Unit 1, Grade 1. In this lesson, students solve "add to with change unknown" word problems and discuss the connection between addition and subtraction. For example, when solving the problem "There were 5 books on a shelf. A student came and put some more books on the shelf.
Other Problem Sets related to this standard
Other activities you might be interested in
3 min(s)
