# 7th Grade Module 2

New or Recently Introduced Terms

Additive Identity (The additive identity is 0.)

Additive Inverse (The additive inverse of a real number is the opposite of that number on the real number line. For example, the opposite of −3 is 3. A number and its additive inverse have a sum of 0.)

Break-Even Point (The point at which there is neither a profit nor loss.)

Distance Formula (If ݑݠand ݑޠare rational numbers on a number line, then the distance between ݑݠand ݑޠis |ݑݦminus;ݑ.)

Loss (A decrease in amount; as when the money earned is less than the money spent.)

Multiplicative Identity (The multiplicative identity is 1.)

Profit (A gain; as in the positive amount represented by the difference between the money earned and spent)

Repeating Decimal (The decimal form of a rational number, For example, 13=0.3䀴Į)

Terminating Decimal (A decimal is called terminating if its repeating digit is 0.)

Familiar Terms and Symbols

Absolute Value

Associative Property (of Multiplication and Addition)

Commutative Property (of Multiplication and Addition)

Credit

Debit

Deposit

Distributive Property (of Multiplication Over Addition)

Expression

Equation

Integer

Inverse

Multiplicative Inverse

Opposites

Overdraft

Positives

Negatives

Rational Numbers

Withdraw

Suggested Tools and Representations

Equations

Expressions

Integer Game (See example to the right)

Number Line

Tape Diagram

**Lesson 9**

colored pencils

**Lesson 15**

paper

**Lesson 20**

calculators