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Adding Integers on a Number Line

With the help of number line we can add 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 add positive number (4) we move 4 units to the right. Result is 3. So, -1+4=3.

adding on number line positive number

Answer: 3.

Let's see how to add negative numbers.

Example 2. Find 5+(-3).

We draw 5 on a number line. Since we add negative number (-3) we move 3 units to the left. Result is 2. So, 5+(-3)=2.

adding on number line negative number

Answer: 2.

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

Exercise 1. Find -5+5.

adding on number line positive number

Answer: 0.

Next exercise.

Exercise 2. Find 4+(-7).

adding on number line negative number

Answer: -3.