Variables and Order of Operations
Which is a variable expression? What is the variable.
A. 7w
B. 7 + 9
A and w!
A number's distance from zero on a number line is the _______.
Absolute value.
Evaluate the expression.
z + (-z) = ?
0.
Can a conjecture be proven wrong? If so, what do you need to prove a conjecture is incorrect?
Yes, a counterexample.
Simplify the expression.
47 - 15 ⋅ 3
2
Evaluate the expression.
2a + 5 for a = 2
9.
Find the sum.
12 + (-3)
9.
Write a rule for the following...
81, 27, 9, 3, 1...
Start at 81, divide each value by 3.
Write a variable expression for the total number of seconds in m minutes
60m.
What is the absolute value of -18?
18.
Find the difference.
17 - (-4)
21.
Write the first 5 values of the rule.
Start at 7, alternate between adding 3 and subtracting 2.
7, 10, 8, 11, 9
Simplify the expression
(56 - 5) ÷ 17
3.
What is a variable in a variable expression replaced with to evaluate the expression?
Use a number line to show the sum. Solve.
-3 + (- 2)
-5.
An old clock lost a minute each day. If it continued like this for a full year, how many minutes would it lose after 2 years?
730 minutes.
Which value is greater?
A. 18 - 6 ÷ 3
B. (18 - 6) ÷ 3
A.
Evaluate the expression
a ÷ b + c ⋅ d for a = 6, b = 1, c = 2, and d = 3.
12
Use a number line to show the difference.
-5 - (-6)
1.
Is the following statement true? If not, provide a counterexample.
4 is a prime number.
False, 1,2,4.