Multiply the first number with the ones digit of the second number.

Multiply the first number with the tens digit of the second number.

Add a zero to the end of this number and add the first number.

The answer is:  

Multiply the first digit of 78 with the first digit of 52.

Multiply the first digit of 78 with the second digit of 52.

Add a zero to the end of this number and add it with the first number.

The answer is:  

Start by finding the first sale price of the sweater. Since it was  off, we can write the following equation to find the first sale price.

Now, since the sweater did not sell at this first sale price, another  was taken off the price. We can then write the following equation to find the second sale price.

Thus, the sweater sold for .

Plug in the given values for the  and .

Now, follow the order of operations.

Simplify the exponents first.

Then simplify the multiplication, then add.

In order to solve for , we need to move all of the variables over to one side.

We can see that our  is being divided by , so in order to move that  we'll need to multiply it on the other side.

Since none of our variables are the same, we cannot proceed any further in this equation.

Our answer is 

In order to solve for , we'll need to get all the other variables to one side so. Right now  is being divided by , so we need to multiply the  to the other side in order to move it.

Since all the variables are different we can't do anything else to simplify the equation.

Our answer is 

In order to solve for , we need to make sure that all our other variables are on the other side of the equation. 

At the moment   is being surrounded by  and  so we need to move these variables to the other side of the equation.

Let's begin by multiplying   on the other side.

We still have  near , so we'll need to add  to the other side in order to get  alone.

Since there are no numbers and none of the variables are the same we can't do anything else to this equation.

Our answer is 

Multiplication is a lot like adding, just with multiples of the same number.

We can solve this two ways, so we will do it both. Let's start with  first.

So we can see that  is being multiplied by . This is the same as saying we are adding two 's.

Now let's go with . We can see that  is being multiplied by , which is the same as saying we are adding four 's.

Either way you pick, both routes give us the answer .

Our answer is .

Use the long division process:

                  5 goes into 12 2 times; 

                   5 goes into 26 5 times; 

                   5 goes into 15 3 times; 

Both differences are defined, as there is no restriction on what two numbers can be subtracted. Zero divided by any nonzero number yields a quotient of zero, so  is defined and equal to zero. But zero cannot be a divisor. This makes  the undefined quantity.