# Common Core MATH 7 NS 2a Grade 7 The Number System Apply And Extend Previous Understandings Of Operations With Fractions To Add Subtract Multiply And Divide Rational Numbers

Back**The Number System: Apply And Extend Previous Understandings Of Operations With Fractions To Add, Subtract, Multiply, And Divide Rational Numbers.**

Understand that multiplication is extended from fractions to rational numbers by requiring that operations continue to satisfy the properties of operations, particularly the distributive property, leading to products such as (-1)(-1) = 1 and the rules for multiplying signed numbers. Interpret products of rational numbers by describing real-world contexts.