Adding Multiples of 10

Do you remember the **multiples of 10?**

Here they are:

10, 20, 30, 40, 50, 60, 70, 80, 90, 100

Do you see a pattern?

🤗 Multiples of 10 always have **0 **in the **Ones **place.

Adding multiples of ten is easy. The **sums** also always have a **0 **in the **Ones **place.

Let's learn from an example:

You can think about the problem as:

2 Tens + 1 Tens = ?

We know that 2 + 1 = 3.

So what's 2 Tens + 1 Tens?

It's **3 Tens!**

That means 20 + 10 = **30 **😎

Another way to add multiples of 10 is to use column form. For example, let's solve:

First write the column form:

Then, add the Ones place digits:

Multiples of 10 always have 0 in the Ones, so this will always be 0.

Let's move on to the Ten's place:

So using the column form we see that 30 + 50 = 80 🎉

Congratulations on learning to add multiples of 10! Now try the practice problems.

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