What's the Variable?
In the equation x + 5 = 12, what is the variable?
What is x?
Solve for x: x + 6 = 11
What is x = 5?
I have 8 marbles. I get m more. Now I have 13 marbles. Write an equation with m.
What is 8 + m = 13?
A letter, such as n, that stands for a number is called ______.
What is a variable?
To solve x + 7 = 10, what operation do you use to solve it?
What is subtraction?
In 20 - n = 9, what does n stand for?
What is the unknown number subtracted from 20?
Solve for n: 20 − n = 14
What is n = 6?
There are 25 students in class. s of them ride the bus. 10 get picked up by car. Write an equation with s.
What is s + 10 = 25?
A type of math in which letters of symbols are used to represent unknown parts of an expression or equation is called _____.
What is algebra?
To solve 4 · y = 24, which operation do you use? Then solve for y.
What is division? y = 6
A student writes 5 + s = 13 for this problem: “I had 5 donuts and got some more. Now I have 13.” What does s stand for in the equation?
What is the number of more donuts they got?
Solve for y: 3 · y = 12
What is y = 4?
A book has 100 pages. You have read r pages. You have 40 pages left. Write an equation with r.
What is 100 − r = 40?
A problem that has a variable and an equal sign is called ______.
What is an open sentence/variable equation?
To solve p ÷ 3 = 9, which operation do you use? Then solve for p.
What is multiplication? p = 27
Look at the equation: t − 4 = 11. What is the variable, and what could it mean in a word problem?
What is t? It can be the starting amount before 4 was taken away.
Solve for p: p ÷ 4 = 7
What is p = 28?
There are c cookies shared equally into 5 bags. Each bag has 4 cookies. Write an equation with c.
What is c ÷ 5 = 4 (Also accept 5 · 4 = c.)
Write an expression with a variable for this phrase: “5 more than a number y”
What is y + 5?
To solve 20 - n = 15, which operation do you use? Then solve for n.
What is subtraction? n = 5
In a game, a student writes 30 ÷ p = 5. What is the variable, and what could p represent?
What is p? It could represent number of people/groups (answers may vary)
Solve for k: 27 − k = 9
What is k = 18?
The equation is: h − 18 = 42. Create and write a word problem that could match this equation.
Answers may vary. Example: A character in a video game started with h health points. They lost 18 points and now have 42 left. How many health points did they start with?
Write an expression with a variable for this phrase: “A number n divided by 4”
What is n/4?
To solve 30 − p = 18, what operation would you use to solve for p? Then solve for p.
What is subtraction? p = 12