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.
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.
Answer: 2.
Now, do the following exercise to remember this topic better.
Exercise 1. Find -5+5.
Answer: 0.
Next exercise.
Exercise 2. Find 4+(-7).
Answer: -3.