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Add 3 Single Digit Numbers
Overview
By now you should be comfortable with adding two numbers.
In this lesson, we are going to learn how to add three numbers together.
Look at the example below:
When adding three numbers, choose two to add first.
In this case, we can add 6 + 3.
6 + 3 = 9. Now, we will take our sum of 9 and join it with our last addend.
9 + 2 = 11
Therefore,
6 + 3 + 2 = 11
Let’s try a few more problems together! Use the pictures to help you solve.
In this case, we can first add 3 + 1.
3 + 1 = 4. Now, we will take our sum of 4 and join it with our last addend.
4 + 5 = 9
Therefore,
3 + 1 + 5 = 9
We can first add 4 + 5.
4 + 5 = 9. Now, we will take our sum of 9 and join it with our last addend.
9 + 7 = 16
Therefore,
4 + 5 + 7 = 16
We can first add 2 + 5.
2 + 5 = 7. Now, we will take our sum of 7 and join it with our last added.
7 + 1 = 8
Therefore,
2 + 5 + 1 = 8
We can first add 6 + 3.
6 + 3 = 9. Now, we will take our sum of 9 and join it with our last addend.
9 + 4 = 13
Therefore,
6 + 3 + 4 = 13
We can also add the numbers in any order and we will still get the same sum!
For example: We could add 6 + 4 first and then join the last addend of 3 with it.
6 + 4 = 10
10 + 3 = 13
6 + 3 + 4 = 13
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You can join the addends in any order. Try each problem two different ways to check and make sure your answers are the same!
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