## Unit 3 Expressions Overview

In this unit students will:

• Represent repeated multiplication with exponents

• Evaluate expressions containing exponents to solve mathematical and real world problems

• Translate verbal phrases and situations into algebraic expressions

• Identify the parts of a given expression

• Use the properties to identify equivalent expressions

• Use the properties and mathematical models to generate equivalent

expressions

**KEY STANDARDS**

Apply and extend previous understandings of arithmetic to algebraic expressions.

MCC6.EE.1Write and evaluate expressions involving whole-number exponents.

Apply and extend previous understandings of arithmetic to algebraic expressions.

MCC6.EE.1

**MCC6.EE.2**Write, read, and evaluate expressions in which letters stand for numbers.

**Write expressions that record operations with numbers and with letters standing for numbers.**

MCC6.EE.2a

MCC6.EE.2a

*For example, express the calculation "Subtract y from 5" as 5-y.*

**Identify parts of an expression using mathematical terms (sum, term, product, factor, quotient, coefficient); view one or more parts of an expression as a single entity. For example, describe the expression 2(8 + 7) as a product of two factors; view (8 + 7) as both a single entity and a sum of two terms.**

MCC6.EE.2b

MCC6.EE.2b

**Evaluate expressions at specific values of their variables. Include expressions that arise from formulas used in real-world problems. Perform arithmetic operations, including those involving whole-number exponents, in the conventional order when there are no parentheses to specify a particular order (Order of Operations). For example, use the formulas 𝑉= 𝑠3 and 𝐴=6𝑠2 to find the volume and surface area of a cube with sides of length 𝑠=12.**

MCC6.EE.2c

MCC6.EE.2c

**Apply the properties of operations to generate equivalent expressions.**

MCC6.EE.3

MCC6.EE.3

*For example, apply the distributive property to the expression 3(2+ x) to produce the equivalent expression 6 + 3x; apply the distributive property to the expression 24x + 18y to produce the equivalent expression 6(4x + 3y); apply properties of operations to y + y + y to produce the equivalent expression 3y.*

**Identify when two expressions are equivalent (i.e., when the two expressions name the same number regardless of which value is substituted into them.)**

MCC6.EE.4

MCC6.EE.4

*For example, the expressions y + y + y and 3y are equivalent because they name the same number regardless of which number y stands for.*

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