7

2

x

5

7

2

x

5

a letter that represents an unknown number

a number

the number in front of a letter

part of an expression

7

x

5

3

add

subtract

multiply

divide

a letter that represents an unknown number

a number

the number in front of a letter

part of an expression

1

2

3

4

answer to a multiplication problem

answer to a subtraction problem

answer to an addition problem

answer to a subtraction problem

$5\cdot3$

$5\left(3\right)$

$5y$

$\frac{10}{5}$

 $6^2+5y$   

 $5y$  

 $\frac{12}{3}$  

 $5y-\frac{12}{3}$  

answer to an addition problem

answer to a subtraction problem

answer to a multiplication problem

answer to a division problem

 $8\left(y+5\right)^2$  

 $\left(y+5\right)$  

 $\frac{20}{5}$  

the answer to an addition problem

the answer to a subtraction problem

the answer to a multiplication problem

the answer to a division problem

 $8\cdot5$  

 $5+3^2$  

 $\frac{12}{2}$  

 $3^2-\frac{12}{2}$  

the answer to a multiplication problem

the answer to an addition problem

the answer to a division problem

the answer to a subtraction problem

 $10^2+5\left(y-8\right)$  

 $5\left(y-8\right)$  

 $\frac{20}{4}$  

 $5\left(y-8\right)+\frac{20}{4}$