Adding multi-digit numbers

4 videos
1 skill
You know how to add multi-digit numbers from the 3rd grade. Now we will give you even more practice (and tackle even larger numbers)! We'll dive into something called "regrouping" or "carrying" - it's a nifty little trick that makes adding multi-digit numbers much easier! Common Core Standard: 4.NBT.B.4

Place value warmup

VIDEO 3:02 minutes
Learn about place value using a toy with beads (an abacus).

Adding three-digit numbers

VIDEO 2:26 minutes
Learn how to carry when adding a three-digit number.

Adding: why carrying works

VIDEO 2:30 minutes
Sometimes when we add, we carry our tens to the next column. Let's watch this so we can understand why it works.

Adding three digit numbers with regrouping

VIDEO 3:04 minutes
In the old days 'regrouping' was known as "carrying." It's the same idea now as then: moving the tens (or hundreds or thousands) over to the next column.

Addition within 1000

Practice adding three-digit numbers. All sums are 1000 or less.