1.1
Order of Operations
Order of Operations
What does PEMDAS stand for? (not "Please Excuse My Dear Aunt Sally"
parentheses, exponents, multiply, divide, add and subtract
Tell which property is represented.
xy = yx
Commutative
Evaluate k + 9 and k = 5.
5 + 9 = 14
Which terms are like terms? Why?
3t, 5w, 7r, 9t, 8v
3t and 9t. They have the same variable.
What is a variable?
a letter that represents a number
Simplify the expression.
3 + 15 / 5
6
Tell which property is represented.
(2 x 6) x 1 = 2 x (6 x 1)
Associative
Evaluate a + 6 for k = 3
3 + 6 = 9
Which terms are like terms? Why?
5w2, 4k, 4y3, 7w, 6w2
5w2 and 6w2. They have the same variable and exponent.
What is constant?
the number that does not change
Simplify the expression.
5 + 62 x 10
365
What is the identity property? Give an example.
any number times 1 equals itself.
any number added with 0 equals itself.
4 + 0 = 4 and 8 x 1 = 8
Evaluate s / 5 for s = 15
15 / 5 = 3
12x - 4x2
What is a term?
is a number, variable or product and is separated by + or -
Simplify the expression.
3 + 23 x 5
43
What is the commutative property? Give an example.
can put numbers in any order
3 + 8 = 8 + 3
Evaluate 4x - 3 for x = 2
4(2) - 3 = 5
Simplify 45z - 37y + 87.
No like terms
What is a coefficient?
a number that is multiplied by a variable
Simplify the expression.
42 - (3 x 4) / 6
40
What is the associative property? Give an example
can group together numbers in any combination with parentheses.
4 x (5 x 6) = (4 x 5) x 6
Evaluate 5x2 + 3x for x =2
5(2)2 + 3(2) = 26
Simplify 4x2 + 4y + 3x2 - 4y + 2x2 + 5
9x2 + 5
What are like terms?
terms with the same variables and same exponents.