Writing Expressions
Issac has 7 red pens and b blue pens.
Write an expression to represent the total number of pens Issac has
What is 7 + b
Roger bought some used CDs at a garage sale and then gave 9 CDs to his dad. If Roger kept 12 of the CD's for himself, how many CDs did he buy at the garage sale?
let c = # of CD's Roger buys at the garage sale
What is "c - 9 = 12"
18 + x = 36
What is "x = 18"?
Simplify the expression:
25y + 3y
What is 28y
A(n) _________________ is an unknown part of an equation, represented by a letter.
What is a variable?
Sarah had 15 quarters. She used q quarters in the vending machine.
Write an expression to represent how many quarters Sarah has now.
What is 15 - q
Felicia and Sam sold 103 muffins at the bake sale. Felicia sold 25 muffins. How many muffins did Sam sell at the bake sale?
let s = the # of muffins Sam sold at the bake sale
What is "25 + s = 103"
x - 45 = 88
What is "x = 133"?
Evaluate the expression using PEMDAS:
(11 – 22) + 3²
What is 16
Each group of variables and numbers, separated by addition and subtraction signs, is called a(n) _____________ of the equation.
What is a term?
Macy had d dollars. She gave half of her dollars to charity.
Write an expression to represent how much money Macy gave to charity.
What is (1/2)d
Francine walked 44 miles last month on her days off. If she walked 4 miles per day, how many days did Francine have off?
let d = # of days Francine had off
What is "4d = 44"
x/3 = 10
What is "x = 30"?
Simplify by combining like terms:
9 + 2m + 56y + 8m - 4y
What is 9 + 10m + 52y
Two expressions set equal to each other creates a(n) _______________.
What is an equation?
A candy company divided c bags of candy into 12 boxes. How many bags of candy are in each box?
What is c/12
Alison split her total number of candy bars into groups 3 to give out to trick-or-treaters for Halloween. If there were 17 trick-or-treaters, how many candy bars did Allison have to begin with?
let c = # of candy bars Allison gave out for Halloween
What is 17 = c/3
15 * x = 75
What is "x = 5"?
Evaluate the expression using PEMDAS
(9 - 22 + 10 x 8)÷5
What is 17
A(n) ________________ is a combination of numbers, variables, and symbols that illustrate a mathematical relationship
What is an expression?
Five times the sum of 4 and t
Write an expression to represent this situation
What is 5(4 + t)
Zelda is six pounds lighter than Gideon. If Zelda weighs 9 pounds, how much does Gideon weigh?
let g = Gideon's weight in pounds.
What is "9 = g - 6
(4/5)m = 72
What is 90
Simplify the expression - be sure to combine all like terms
2x + 5(x+7) -3 + 6x - 2x
What is 11x+32
The number attached to a variable by multiplication is called the __________________
Ex: the "3" in 3x
What is coefficient