Earlier, you learned how to skip count by 10:
0, 10, 20, 30, 40, 50, 60...
These numbers are all called multiples of 10!
Multiples of 10 are numbers with a 0 in the Ones place.
When we add multiples of 10, we always get a 0 in the Ones place.
Let's learn how to add multiples of 10 with an example.
You can think about the problem as:
2 Tens + 1 Tens = 3 Tens
That means 20 + 10 = 30 😎
You can also add multiples of 10 using column form.
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.
Finally, add the Ten's place:
So, 30 + 50 = 80 🎉
Congratulations on learning to add multiples of 10!
Now, try the practice problems.