### All ISEE Middle Level Math Resources

## Example Questions

### Example Question #143 : Operations

Subtract the following:

**Possible Answers:**

**Correct answer:**

To subtract 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 it like this:

We can read this as: We have borrowed 7 books from the library. We return 4 of those books to the library. How many books do we have left? We have 3 books. So,

We can subtract variables the same way. We get

### Example Question #144 : Operations

Simplify the following:

**Possible Answers:**

**Correct answer:**

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

we can think of the variable *c *as crackers. So, we can write the problem like this:

Now, we can read the problem like this: We have a plate with 10 crackers. We go and eat 4 of the crackers. How many crackers are left on the plate? There are 6 crackers. So,

We can subtract variables the same way:

### Example Question #145 : Operations

Subtract the following:

**Possible Answers:**

**Correct answer:**

When subtracting variables, we can look at the variables like objects. So, in the problem

we can think of the variable *b* as brownies. So, we can write the problem like this:

We can read it like this: You see there is a plate that contains 10 brownies. You love brownies, so you eat 2 of them. How many brownies are left on the plate? There are 8 brownies left.

We can subtract variables the same way.

### Example Question #146 : Operations

Subtract the following:

**Possible Answers:**

**Correct answer:**

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

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

We can read it like this: There is a plate with 10 cookies on it. They smell delicious, so we decide to eat 4 cookies. How many cookies are left on the plate? There are 6 cookies left on the plate.

We can subtract variables the same way:

### Example Question #147 : Operations

Simplify:

**Possible Answers:**

**Correct answer:**

Begin by distributing the subtraction through the group:

Next, change the double negative to a positive:

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