Variable

definition

100

What is a variable?

Variable is an UNKNOWN number. (e.g., x, y, b, c) 

200

What is an equation?

Equation is a way to say that two things are equal. It contains an equal sign.

300

Which one is an example of an expression and WHY?

1) 3x+4y=56

2)45y=356

3)5c-54

4)4r x 4= 123

3) 5c-54 because it does not contain an equal sign 

400

What is a coefficient?

number is used to multiply a variable 

500

What is an inverse operation? give me an example 

opposite. multiplication is division. addition becomes subtraction.

inverse operation

100

What an inverse operation for +

minus/ subtraction

200

What is an inverse operation for -

plus,addition 

300

What is an inverse operation for division 

multiplication 

400

What is an inverse operation for multiplication 

division 

500

what an inverse operation for this equation 

45=6 x r 

division 

addtion/subtraction

100

7=S+5

S= 2

200

6=7-L

L=1

300

34=84-V

V=50

400

Z-24=14

Z=10

500

94-E=47

E= 47

multiplication/divison

100

2=6÷ M

M=3

200

5=R x 1

R=5

300

9 ÷  F= 3

F= 3

400

9 X H = 135

H= 15

500

5= 125 ÷ Y

Y= 25

word problem

100

On HAlloween night, CHrist went trick-or-treating at 12 houses. If Luigi visited 9 more houses than Chris did, how many houses di dLuigi visit?

p= 21

200

Natalie buy sorganic almonds priced at $77 from the grocery store. How much did she pay the cashier, if she received $23 in change?

N= 100

300

Trevor takes up a test at school and completes it in an hour. The test has two sections. If he takes 35 minutes to complete the first section, how much time does he have left to complete the second section?

25

400

Augustine is selling his baseball cards at a yard sale. He is selling his cards for $3 each. At the end of the yards sale, he made $60. How many baseball cards did he sell?

20

500

A movie theatre has 9 rows of seats. In each row, there are 11 seats. How many total seats are in the movie theatre?

99