NC.7.NS.1 Apply and extend previous understandings of addition and subtraction to add and subtract rational numbers, using the properties of operations, and describing real-world contexts using sums and differences. 

NC.7.NS.2 Apply and extend previous understandings of multiplication and division. 

a. Understand that a rational number is any number that can be written as a quotient of integers with a non-zero divisor. 

b. Apply properties of operations as strategies, including the standard algorithms, to multiply and divide rational numbers and describe the product and quotient in real-world contexts. 

c. Use division and previous understandings of fractions and decimals. 

• Convert a fraction to a decimal using long division. 

• Understand that the decimal form of a rational number terminates in 0s or eventually repeats. 

NC.7.NS.3 Solve real-world and mathematical problems involving numbers using the four operations.