Using regrouping to subtract within 1000

5 videos
1 skill
You can subtract 21 from 45, but are a bit perplexed trying to subtract 26 from 45 (how do you subtract the 6 in 26 from the 5 in 45). This tutorial is your answer. You'll see that we can essentially "regroup" the value in a number from one place to another to solve your problem. This is also often called borrowing (although it is like "borrowing" sugar from your neighbor in that you never give it back). Common Core Standard: 3.NBT.A.2

Subtracting: three digit numbers and basic regrouping

VIDEO 2:47 minutes
Subtracting multi-digit numbers can be a little confusing when the top digits are smaller than the bottom ones. Let's look at regrouping together. It will help!

Subtracting: three digit numbers and regrouping

VIDEO 3:20 minutes
When we don't have enough of something, we sometimes borrow it. Same in math! When there aren't enough tens (or hundreds, etc) to subtract with, we can borrow (also called regrouping).

Subtracting: regrouping twice

VIDEO 3:48 minutes
Getting a little fancier with our regrouping now. What if you have TWO numbers that require you to borrow or regroup? You guessed it! You have to take value from one place and give it to another.

Subtracting: Regrouping from zero

VIDEO 2:24 minutes
In Kindergarten you learned the importance of sharing, right? In math, when we lack value in a number to subtract with you borrow or regroup from a neighbor. Sometimes you borrow from the tens...but what if you have zero tens? Ha....let's ...

Subtraction within 1000

Subtract with two numbers less than 1000.

Mental technique for subtraction without regrouping

VIDEO 2:37 minutes
Use an understanding of place-value to subtract.