Across
- 4. Terms that have the same variable
- 5. the variables and numbers in a mathematical expression that are joined by signs for operations
- 7. A letter used to represent a number in a mathematical expression
- 8. Numbers less than zero
- 9. A number sentence that states two numbers or quantities are equal
Down
- 1. The opposite operation that"undoes" another
- 2. Terms that do not have the same variable
- 3. numbers numbers greater than zero
- 6. The number that replaces the variable in an equation to make the equation true
- 9. to substitute a number for each variable in an expression and simplify the expression