Definitions
a placeholder or a symbol that represents a value, quantity, or piece of information that can change
Variable
3X7
21
a(b+c)
ab+ac
What is the formula for area of a rectangle?
Length x width
2+6-3
5
a sign that tells you to perform a specific action or process on one or more numbers or expressions
Operational symbols
6X7
42
3(b+c)
3b+3c
Abby has a sidewalk that is 8 feet wide and 10 feet long. What is the area of the sidewalk?
80 square feet
2+3X6
20
a mathematical sentence that uses an equals sign to show that two expressions are the same as one another. An equation can contain numbers, variables, or both in the same mathematical sentence.
Equation
7X7
49
2(3+4)
6+8
I have a room that is 12 feet long by 6 feet wide. What is the area of this room?
36 square feet
3(2+4)
18
a mathematical phrase that contains numbers and operations
Numeric Expression
8X7
56
6(6+9)
36+54
I have a 1/2ft wide strip of material 4 feet long, what is the area of this strip of material in square feet?
2 square feet
3X4X3
36
This property states that for any a(b + c) = ab + ac and vice versa
Distributive Property
9X7
63
6(15+7)
90+42
I have enough mulch to cover 25 square feet, if I have a flower bed that is 3 feet wide and five feet long, and a flower bed that is 5 feet wide and four feet long, do I have enough mulch for both flower beds?
No, I need more mulch for the last 10 square feet.
3X4X52
300