## Subtracting from Negative Numbers: Worksheets and Answers

## How to Subtract a Positive from a Negative Number using a Number Line

Both 3 and 4 are positive numbers. We can show that they are both **positive** by writing a **plus sign** in front of each number.

However, plus signs are not necessary to show that a number is positive.

**It is assumed that a number is positive unless a minus sign is written in front of it**.

The **plus sign** means that we move in the **positive** direction, which is to the **right** on the number line.

The ‘+3’ means that we start at 0 and move three places to the right.

The ‘+4’ means that we move another four places to the right.

We have moved a total of seven places to the right on our number line.

So,

3 + 4 = 7

In the calculation below, we have ‘- 3 – 4’.

The **minus sign** means that we move in the **negative** direction, which is to the **left** on the number line.

The ‘-3’ means that we start at 0 and move three places to the left.

The ‘-4’ means that we move another four places to the left.

We have moved a total of seven places to the left.

So,

– 3 – 4 = – 7

In both calculations, we moved a total of seven places.

The positive signs meant that we moved a total of seven places to the right.

The negative sign meant that we moved a total of seven places to the left.

We moved 3 left and 4 left to move 7 places left on our number line.