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Subtracting Integers on a Number Line

With the help of number line we can subtract integers.

It is better to show on examples how to do this.

Example 1. Find -1-4.

We draw -1 on a number line. Since we subtract positive number (4) we move 4 units to the left. Result is -5. So, -1-4=-5.

subtraction on number line positive number

Answer: -5.

Let's see how to subtract negative numbers.

Example 2. Find -1-(-6).

We draw -1 on a number line. Since we subtract negative number (-6) we move 6 units to the right. Result is 5. So, -1-(-6)=5.

subtraction on number line negative number

Answer: 5.

Now, do the following exercise to remember this topic better.

Exercise 1. Find 4-8.

subtraction on number line positive number

Answer: -4.

Next exercise.

Exercise 2. Find 1-(-1).

subtraction on number line negative number

Answer: 2.