Writing Expressions/Equations
Five times the sum of 4 and t
"5(4 + t)"
36n
EXPRESSION
An _________ is a mathematical phrase that contains numbers, variables, or both. _______ never have an equal sign.
Expression
How many terms are in the following expression:
3x + 2y – 2x + 6
4
Is this an equation or expression?
75÷5t=15
Equation
James has 10 red Among Us stickers and b blue Among Us stickers. How many stickers does James have?
"10 + b" Among Us stickers
125t + 3
Expression
An _________ is a mathematical sentence that says two expressions are equal. ________ always have an equal sign.
Equation
What are the variables in this expression?
3x + 5y
x and y
True or False
Equations always have an equal sign.
Jackie and Andrea sold 120 cookies at the bake sale. Sam sold 75 cookies. How many cookies did Jackie sell at the bake sale?
"75 + j = 120" or
"j + 75 = 120" or
"120 - 75 = j" or
"120 - j = 75"
20t = 60
Equation
A ________ is a letter that represents an unknown amount.
Variable
Is this an expression or an equation?
(3 + a) - 2b
Expression
True or False
Expressions sometimes have an equal sign.
False
Expressions never have an equal sign.
Dre bought some new Among Us plushies at a sale. He gave 3 plushies to Chris and kept 6 of them for himself. How many Among Us plushies did Dre buy at the sale?
"a - 3 = 6" or
"a - 6 = 3" or
"3 + 6 = a" or
"6 + 3 = a"
7(5 + r)
Expression
A _________ is a number multiplied by a variable. A _________ is written immediately in front of the variable
Coefficient
How many terms, variables and coefficents are there in this expression?
5x - 8 + 3 + 2y - 5
Term: 5
Variables: 2 (x and y)
Coefficients: 2 (5 and 2)
Identify the terms in this expression:
8c+b+6
8c, b, 6
Andi earns $12 per hour deliering cakes. She worked for x hours this week. Unfortunately, she was charged $15 for a late delivery on Tuesday.
How much money did Andi earn this week?
Write your answer as an expression.
12x-15
25v - 6 = 12 + 32
Equation
A ______ is a part of an expression or equation that is added or subtracted. Each _____ in an expression is separated by a + sign or - sign.
Term
Cooper drew p pictures. Jared drew 80 fewer pictures than Cooper. Choose the expression that shows how many pictures Jared drew. Write an expression.
p − 80
Terms in an expression are separated by a ___ sign or ____ sign.
+ and -