- This PDF File - The mathematics curriculum for Third Grade students in the United States is designed to build a strong foundation in basic mathematical concepts and skills. *** Third Grade Unit 2 : Addition, Subtraction, Multiplication, and Division *** - Fluently add and subtract within 1,000. - Multiply and divide within 100. - Solve word problems involving all four operations. This is everything you need to print and go to teach these concepts to a variety of learners - it will save you so