## ◂Math Worksheets and Study Guides First Grade. Using Number Line

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

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.a. Count to 120. (CCSS: 1.NBT.1)
1.1.1.a.ii. Within 120, read and write numerals and represent a number of objects with a written numeral. (CCSS: 1.NBT.1)
1.1.1.b. Represent and use the digits of a two-digit number. (CCSS: 1.NBT.2)
1.1.1.b.ii. Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <. (CCSS: 1.NBT.3)
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.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)