Parts of algebraic expressions
a symbol, usually a letter, that represents an unknown numerical value or a quantity that can change
what is a variable?
evaluate 4 - 2f when f=1
what is 2
the property when changing the order of addends does not change the sum.
j - 15 when written out is this.
what is j minus 15?
the factors of an expression that are added and subtracted
what is a term?
15/r - 1 when r = 5
says that changing the grouping of the factors does not change the product
what is the associative property of multiplication?
x subtracted from 35.2 is this expression.
what is 35.2 - x ?
the non-variable that is multiplying the term
what is the coefficient?
4x - 2x for x = 2
what is 12?
says that the product of 1 and any number is that number
what is the identity property of multiplication?
these are the 8 most common wordings used for addition and subtraction operations.
what is plus, sum, more than, increased by (addition) and subtracted, minus, difference, less than, decreased by (subtraction)?
"(x +1)" in the expression xyz + (x + 1)(y) + 4x
What is a factor?
x + 2x - xy
x = 4 y=2
what is 4?
2 + 190 + 34592 + 23 = 190 + 34592 + 23 + 2
is an example of this property.
What is the commutative property of addition?
This expression represents "4 times the difference of x and 2."
what is 4(x - 2)?
The entire expression
4(8x + 5)
is a sum of how many terms?
what is 1 term?
4x + 10 = 12
what is x = 1/2?
(53.8 + 1/3) + 12.4 + 904 = 53.8 + (1/3 + 12.4) + 904
is an example of this property.
what is the associative property of multiplication?
This is the expression of this word problem:
Vince set a goal to practice playing his guitar for r minutes each week. Last week, he practiced his guitar for twice as many minutes as his goal! This week, he was only able to practice his guitar for 20 minutes. Write an expression that shows how many minutes Vince practiced playing his guitar last week and this week combined
what is 2r + 20?