Domain

Operations and Algebraic Thinking

Cluster

Represent and solve problems involving addition and subtraction.

Standards

1. Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

2. Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Understanding addition and subtraction - Sarah Ragan

This investigation will help the children have more understanding of addition and subtraction and how to solve problems

Directions: Do the instructional activity posted then do the worksheet attached

For the web sites below, complete the attached set of questions. Use the Corresponding links to help you with your questions.

Then create at least 20 of your own equations using the objects in your household. They must all be different equations and must be addition and subtraction only.