## ◂Math Worksheets and Study Guides First Grade. Commutative Property

### The resources above correspond to the standards listed below:

#### Colorado Academic Standards (CAS)

CO.1.1. Number Sense, Properties, and Operations
1.1.1. The whole number system describes place value relationships within and beyond 100 and forms the foundation for efficient algorithms. Students can:
1.1.1.c. Use place value and properties of operations to add and subtract. (CCSS: 1.NBT)
1.1.1.c.i. Add within 100, including adding a two-digit number and a one-digit number and adding a two-digit number and a multiple of ten, using concrete models or drawings, and/or the relationship between addition and subtraction. (CCSS: 1.NBT.4)
1.1.1.c.v. Relate addition and subtraction strategies to a written method and explain the reasoning used. (CCSS: 1.NBT.4 and 1.NBT.6)
1.1.2. Number relationships can be used to solve addition and subtraction problems. Students can:
1.1.2.b. Apply properties of operations and the relationship between addition and subtraction. (CCSS: 1.OA)
1.1.2.b.i. Apply properties of operations as strategies to add and subtract. (CCSS: 1.OA.3)
1.1.2.c. Add and subtract within 20. (CCSS: 1.OA)
1.1.2.c.i. Relate counting to addition and subtraction. (CCSS: 1.OA.5)
1.1.2.c.ii. Add and subtract within 20 using multiple strategies. (CCSS: 1.OA.6)
1.1.2.c.iii. Demonstrate fluency for addition and subtraction within 10. (CCSS: 1.OA.6)