7-C.3 Add and subtract integers
7-C.7 Multiply and divide integers
7-C.9 Evaluate numerical expressions involving fractions
7-E.2 Add and subtract decimals: word problems
7-G.4 Add and subtract mixed numbers: word problems
7-G.16 Add, subtract, multiply, and divide fractions and mixed numbers: word problems
Khan Academy: Identifying Constant of Proportionality
Khan Academy: Constant of Proportionality from Graphs
Mr. Hammond: Powers and Exponents
Mrs. Milostan: Powers and Exponents
Mr. Hammond: Numerical Expressions and Order of Operations
Mr. Hammond: Variables and Expressions
Khan Academy: Evaluating Expressions with Variables
Khan Academy: Evaluating Expressions with Exponents
Khan Academy: Multiplying and Dividing Negative Numbers
Khan Academy: Why a Negative Times a Negative Makes Sense
Mrs. Milostan: Rational Numbers