One Step Equations
x + 3 =9
x = 6
2x + 5 = 11
x = 3
Define: Variable
a symbol for a number that is unknown.
Find the perimeter of a rectangle with length 12 cm and width 8 cm.
40cm
10 + w = 15
w = 5
4a + 3 = 23
a = 5
Define: Coefficient
A number that is used to multiply a variable (eg. 4x)
If a box contains 24 pencils and each student gets 3 pencils, how many students can receive pencils from the box?
8 students
8y = 32
y = 4
8b - 4 = 84
b = 11
Define: Expression
An expression is like a math phrase that can have numbers, variables, or operations like addition, subtraction, multiplication, or division but NO "equals" sign.
(eg. 6x+3, 9z, 5+1)
What is the place value of the "3" in this number?:
493,751
Thousands
6c = 18
c = 3
(q รท 7) + 10 = 15
q = 35
Define: Equation
An equation is like a Math sentence with a balance scale that shows that two things are equal. It must include an "equal" sign to be considered an equation.
(eg. 8-3=5)
Convert 17/5 to a mixed number
3 2/5
r - 7 = 5
r = 12
3(t+3) = 27
t = 6
Define: PEMDAS
Parentheses, Exponents, Multiplication, Division, Addition, Subtraction
Convert 7 6/8 to an improper fraction.
62/8