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Grade 7 - Topic 4 Vocabulary
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Terms in this set (18)
algebraic expression
A mathematical phrase that consists of variables, numbers, and operation symbols
Coefficient
The number part of a term that has a variable
constant
A term that only contains a number
evaluate (no variables)
follow the order of operations
factor (adj)
Write an expression as a product
: 2x +4 factored: 2 (x + 2)
factor (n)
Numbers that are multiplied to give a product
greatest common factor (GCF)
The greatest number that is a factor of all of the numbers
like terms
Terms that have identical variable parts (variables and exponents) are like terms
numerical expression
A mathematical phrase that consists of numbers, (can contain grouping symbols - cannot contain variables) and operation symbols
simplify
Combine the like terms of an expression (order of operations)
substitute
Replace the variable of an expression with a number
term
A number, a variable, or the product of a number and one or more variables (separated by addition)
Variable
A letter that represents an unknown value
Order of Operations (PEMDAS)
Parenthesis, Exponents, Multiplication or Division (left to right), Addition or Subtraction (left to right)
what makes a value a solution to an equation?
when one side = the other side
x + 4 = 12 when x = 8, 8 is a solution. x = 7 is not a solution
evaluate (with variable)
substitute (value for variable) and simplify
when x = 3 evaluate 2x+4
2x+4
2(3) +4
6 +4
10
Commutative Property
The order in which numbers are added or multiplied does not change the sum or product.
Associative Property
Changing the grouping of numbers will NOT change the value. For example: (7 + 4) + 8 = 7 + (4 + 8) also works with multiplication (order stays the same)
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