### All SAT Math Resources

## Example Questions

### Example Question #3 : How To Add / Subtract / Multiply / Divide Negative Numbers

If x is a negative integer, what else must be a negative integer?

**Possible Answers:**

x²

x – (–x)

x² – x

x – x

**Correct answer:**

x – (–x)

By choosing a random negative number, for example: –4, we can input the number into each choice and see if we come out with another negative number. When we put –4 in for x, we would have –4 – (–(–4)) or –4 – 4, which is –8. Plugging in the other options gives a positive answer. You can try other negative numbers, if needed, to confirm this still works.

### Example Question #4 : How To Add / Subtract / Multiply / Divide Negative Numbers

–7 – 7= x

–7 – (–7) = y

what are x and y, respectively

**Possible Answers:**

y = 0, x = 14

x = 14, y = –14

x = –14, y = 0

x = 0, y = 0

x = –14, y = 14

**Correct answer:**

x = –14, y = 0

x: –7 – 7= –7 + –7 = –14

y: –7 – (–7) = –7 + 7 = 0

when subtracting a negative number, turn it into an addition problem

### Example Question #1 : How To Subtract Negative Numbers

Evaluate:

**Possible Answers:**

**Correct answer:**

Reconvert into single signs. Remember that double negatives will turn into a positive.

### Example Question #2 : How To Subtract Negative Numbers

Subtract:

**Possible Answers:**

**Correct answer:**

Subtracting a negative number moves the number farther left of the zero digit on the number line.

The answer is:

### Example Question #3 : How To Subtract Negative Numbers

Subtract:

**Possible Answers:**

**Correct answer:**

Simplify the expression by eliminating the double negative signs. Two negatives multiplied by one another will result in a positive number.

Convert the signs.

Add the right side of the equation.

The answer is .

### Example Question #4 : How To Subtract Negative Numbers

Simplify the following expression:

**Possible Answers:**

**Correct answer:**

Simplify the following expression:

To subtract negative numbers, we must recall that subtracting negative numbers is the same as adding a positive. The two negatives cancel each other out to become positive.

So our answer is negative 220

### Example Question #2 : How To Add / Subtract / Multiply / Divide Negative Numbers

If is a positive number, and is also a positive number, what is a possible value for ?

**Possible Answers:**

**Correct answer:**

Because is positive, must be negative since the product of two negative numbers is positive.

Because is also positive, must also be negative in order to produce a prositive product.

To check you answer, you can try plugging in any negative number for .

### Example Question #1 : How To Multiply Negative Numbers

Multiply the following negative numbers: .

**Possible Answers:**

**Correct answer:**

When two negative numbers are multiplied by each other, the result is a positive number.

When a negative and a nonnegative number are multiplied with each other, the result is a negative number.

Therefore, since and are negative numbers, the product must be positive.

Therefore, the answer is positive .

### Example Question #2 : How To Multiply Negative Numbers

Multiply:

**Possible Answers:**

**Correct answer:**

Simplify the expression term by term.

A negative number multiplied by a negative number gives a positive number.

A negative number multiplied by a positive number gives a negative number.

### Example Question #3 : How To Multiply Negative Numbers

Multiply:

**Possible Answers:**

**Correct answer:**

Multiply the first two terms. A negative number times another negative will result in a positive number.

Multiply 27 with negative 2. A positive number times a negative number will result in a negative number.

The answer is:

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