Vocabulary
What is a term in math?
A number, a variable, or a number and variable multiplied together.
In the expression 4x+3, what is the variable?
x
Solve: x+5 = 10
x = 5
Solve: x−4=10
x=14
Lisa had $15. She got more money and now has $20. How much did she get? x+15=20
x=5
What is a variable?
A symbol (usually a letter) that represents an unknown value.
In the expression 7+y, what is the constant?
7
Solve: a+12=20
a=8
Solve: y−6=3
y=9
Aliyah had $50. She spent some and now has $30. How much did she spend?
x=20
What is a constant?
A value that does not change.
In 5a−2, how many terms are there?
2 terms
Solve: b + 9 = 13
b = 4
Solve: m−20=30
m=50
John bought candy for $x. He paid with $100 and got $65 change.
x=35
What is a coefficient?
A number multiplied by a variable.
In 2x+6, what is the coefficient?
2
Solve: x+27=50
x=13
Solve: p−8=16
p=24
A water tank had 12L. After using some, 7L remained. How much was used?
x=5
What is an expression?
A math phrase with numbers, variables, and operations but no equal sign.
Which part of the expression 9−b is the variable?
b
Solve: m+100=125
m=25
Solve: x−75=25
x=100
A student had $x. After spending $40, they had $10 left.
x=50