Variables and Expressions
How would you write "32 more than a number n" as an expression?
"32 + n" or "n + 32"
Evaluate the expression 22 - 1
3
Which property states that (7 + 3) + 5 = 7 + (3 + 5)
Associative property (of addition)
Evaluate the expression -3 + -9
-12
How would you write "The product of 8 and a number u" as an expression?
Evaluate the expression (9-4)2 + 5
30
Which property states that 3 x 4 x 2 = 2 x 4 x 3
Commutative property (of multiplication)
Evaluate the expression -4 + 4
0
Simplify 2(3x + 1)
6x + 2
How would you write "The quotient of 5 and a number y" as an expression?
"5/y" or "5 divided by y"
Evaluate the expression 6 + 4 x 2 + 3
17
Which property states that 10 + 0 = 10 or 10 x 1 = 10
Evaluate the expression -5 + 12
7
Simplify 5(4x - 1)
20x - 5
How would you write "3 more than twice a number x" as an expression?
"3 + 2x" or "2x + 3"
Evaluate the expression (20/5) - 2 + 3
5
Which property states that -3 + 3 = 0
Evaluate the expression -4 x -9
36
Simplify -10(-2x + 3)
20x - 30
Explain the difference between an algebraic and a numerical expression.
Algebraic expressions have variables (letters) and numerical expressions do not.
Evaluate the expression 5 x 23 - 2 + 7
45
Which property states that 2(4 + 5) = 8 + 10
Distributive property
Evaluate the expression -100/10
Simplify -6(4x - 2)
-24x + 12