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Chapter 4
Algebra: Using Addition and Subtraction
vocabulary | definition |
---|---|
Parentheses | Symbols used to show what operation should be done first. ( ) |
Expression | The math phrase that uses numbers and operation signs but no equal sign. |
Variable | A letter or symbol that can stand for an unknown number. |
Commutative Property | Changing the order of addends does not change the sum. |
Associative Property | Changing how the addends are grouped does not change the sum. |
Identity Property | The sum of any number and zero is that number. |
Equation | A number sentence that states two amounts are equal. |