Exponents and multiplication

What does

 $x^4$  mean? 

• x * x * x * x

• x + x + x + x

• x * 4

• x + 4

What is

 $5^3$  ?

• 15

• 25

• 125

• 53

Simplify the expression. (Expand out or use the "trick")

 $5^4\cdot5^3$  

•  $5^{12}$  

•  $5^7$  

•  $5^1$  

•  $5^{43}$  

Simplify the expression. (Expand out or use the "trick")

 $x^6\cdot x^3\cdot x^2$  

•  $x^{36}$  

•  $x^{11}$  

•  $x^1$  

•  $x^6$  

When you multiply like bases, you ________ the exponents.
For example:

 $w^3\cdot w^5=w^8$  

• Subtract

• Multiply

• Divide

• Add

Simplify the expression. (Expand out or use the "trick")

 $\left(y^5\right)^2$  

•  $y^7$  

•  $y^3$  

•  $y^{10}$  

•  $y^{25}$  

Simplify the expression. (Expand out or use the "trick")

 $\left(2^2\right)^3$  

•  $2^6$  

•  $2^5$  

•  $2^8$  

•  $2^1$  

When an exponent is raised to another exponent, you ______________ them.
For example:

 $\left(4^2\right)^4=4^8$  

• Add

• Subtract

• Multiply

• Divide

True or False?

 $5^6\cdot5^3=5^{18}$  

• True

• False

True or False?

 $\left(x^5\right)^4=x^{20}$  

• True

• False