Expressions with Variables
Given the expression: 3x +7.
What is the constant? What is the variable? What is the coefficient?
Constant : 7
Variable : x
Coefficient : 3
Give an example of a rational number
Rational number : can be divided into two integers
A natural number + a natural number = 2
1 + 1
Match the correct definition with its' property :
A. Commutative B. Associative C. Distributive.
1. a + (b + c) = (a + b) + c
2. b * a = a * b
3. a * (b + c) = a * b + a * c
A. 2
B. 1
C. 3
What does EACH LETTER in PEMDAS stand for?
Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction
Solve this expression : 5x + 2 , where x = 3
17
Which number belongs to ALL of the set of numbers (rational, whole numbers, integers, and natural numbers)?
A. 2 3/5 B. -21 C. 0 D. 8
D. 8
-5 + (-4)
-9
What is a different way to write 2.3 + 3.7 = 6 ?
3.7 + 2.3 + 6
6 + 12 / 6 * 2
10
Solve this expression : 2x2 + x , where x = 8
136
True or False : The sum 3.2 and 0.8 is a natural number?
TRUE: 3.2 + 0.8 = 6.0 or 6 .
Find -15y for each value of y: y = -4 , y = -2 , & y = 5
y = -4 : 60
y = -2 : 30
y = 5 : -75
Simplify : 7a + 2a - a + 6b - 5b
8a + b
9 + 3 (5-4) / 32 - 3
2
Solve this expression : x3 + x2 + x , where x = 3
39
Put a > or < between each pair of numbers to make a true statement
1. -2.4 ____ 1.1
2. -3.7_____ -8.3
3. -9.8_____ -10.7
4. -5.5 _____ -0.1
1. <
2. >
3. >
4. <
Carridee has made a mistake balancing her checkbook and does not know that she has 0 dollars in her account. She writes 3 checks for $20 each. After the first check goes through, her account balance is -$20. What will Carridee's account balance be after all 3 checks go through?
-$60 .
3 * -$20
Simplify : 5y2 + 4y - y + 7x * (-2x)
-14x2 + 5y2 + 3y
14 + 32 * 4 / 2 (3+(-2))
25
Solve this expression : 23x4+ 4x3+ x2+ x + 11, where x = 2
417
List the set of numbers in order from 1 (being the least) - 6 (being the greatest) :
rational, whole, real, irrational, integers, and natural
1. natural
2. whole
3. integers
4. rational
5. irrational
6. real
Heidi wants to make 38 identical pennants for her class to wave at Field Day. If she has enough money to buy 4 3/4 yards of material, how much material will she be able to use to make each pennant?
1/8 yard
Use the ASSOCIATIVE property of multiplication to evaluate the following expression (3 * x) * 5 where x = -1/5
A. 3 * (-1) B. 5 * (-3/5) C. (-3/5) * 5 D. -3 * (1)
A.
-5 + |6 + (-13)|
2