PBS
Pbs: Simplifying an Algebraic Expression
Simplify expressions with rational numbers using the distributive property of multiplication. This student-generated video focuses on using the distributive property to create equivalent expressions when multiplying by negative numbers...
CK-12 Foundation
Ck 12: Arithmetic: Decimal Addition
[Free Registration/Login may be required to access all resource tools.] Add and subtract decimals with and without rounding