### All ISEE Middle Level Math Resources

## Example Questions

### Example Question #41 : How To Add Variables

Combine the following:

**Possible Answers:**

**Correct answer:**

To add variables, we will look at the variables like objects. So in the problem

we will think of *a* as being apples. So we can read this problem as

So, if we have 3 apples, and we go to the market and we buy 6 more apples, how many apples do we now have?

We add variables the same way. So,

We can look at this as we have 3 of something, we want to add 6 more somethings, so how many do we have now?

### Example Question #42 : How To Add Variables

Add the following:

**Possible Answers:**

**Correct answer:**

In the problem

we will first insert a coefficient on the second term. When a variable stands alone, it has a coefficient of 1. So,

When adding variables, we can look at the variables as objects, then combine those objects.

Now, we can think of the variable *a* as cars. So, we can look at it as

We can think of it like this: If we see 5 cars pass by us on the road, and we see 1 more car pass us, how many cars have passed us? The answer is 6. There were 6 cars that passed us. So,

We add variables the same way.

### Example Question #43 : How To Add Variables

Add the following:

**Possible Answers:**

**Correct answer:**

When adding variables, we can look at the variables as objects. So, in the problem

we can think of *x* as books. So, we can write it like this

We can think of it like this. We have 4 books and we borrow 2 more books. How many books have we borrowed?

We have borrowed 6 books.

We can add variables the same way.

### Example Question #44 : How To Add Variables

Add the following:

**Possible Answers:**

**Correct answer:**

When adding variables, we can look at the variables as objects.

So, in the problem

we can think of the variable *a* as apples. So, we can write it like

We can think of the problem like this: We have 2 apples, and we go to the store and buy 3 more apples. How many apples do we have now? We have 5 apples. So, we can solve it like

We add variables the same way. So,

### Example Question #45 : How To Add Variables

Combine the following:

**Possible Answers:**

**Correct answer:**

To add variables, we will look at the variables like objects. So, in the problem

we can think of the variable *a* as airplanes. So, we can write it like this:

We can think of the problem like this: We are outside and we see 5 airplanes in the sky. Throughout the day, we see 6 more airplanes. How many airplanes do we see all day? We see 11 airplanes. So,

We add variables the same way.

### Example Question #46 : How To Add Variables

Combine the following:

**Possible Answers:**

**Correct answer:**

To add variables, we can think of the variables like objects. So, in the problem

we can think of the variable *s* as snakes. So, we can write it like this:

We can think of it like this: We are at the zoo. We see 2 snakes in a pit. We walk a little more, and we see 8 more snakes. How many snakes have we seen at the zoo? We have seen 10 snakes. So,

We add variables the same way:

### Example Question #47 : How To Add Variables

Combine the following:

**Possible Answers:**

**Correct answer:**

To add variables, we will look at the variables like they are objects. So, in the problem

we can think of *b* as books. So, we can write it like this:

We can think of the problem like this: You have borrowed 2 books from the library. You go back, and you borrow 7 more books. How many total books have you borrowed? You have borrowed a total of 9 books. So,

We add variables the same way. We get

### Example Question #48 : How To Add Variables

Combine the following:

**Possible Answers:**

**Correct answer:**

When combining variables, we can think of the variables as objects. So, in the problem

we can think of the variable *m* as movies. So, we can write it like this:

We can read it like this: We have 2 movies. We go to the store, and we buy 3 more movies. How many movies do we have now? We have 5 movies. So,

We add variables the same way.

### Example Question #49 : How To Add Variables

Combine the following:

**Possible Answers:**

**Correct answer:**

To add variables, we will look at the variables like they are objects. So, in the problem

we can think of the variable *b* as books. So, we can write the problem as

So, we can read the problem like this: We have borrowed 2 books from the library. We go back to the library and borrow 5 more books. How many total books have we borrowed from the library? We have borrowed 7 books. So,

We add variables the same way.

### Example Question #50 : How To Add Variables

Combine the following:

**Possible Answers:**

**Correct answer:**

To add variables, we will look at the variables like objects.

So, in the problem

we can think of the variable *p* as potatoes. So, we can write it like

We can read the problem like this: We go to the store to buy 5 potatoes. We realize we need more, so we buy 5 more potatoes. How many potatoes did we buy in total? We bought 10 potatoes. So,

We can add variables the same way.

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