Subtraction: Learn to subtract 1-digit numbers from multiples of ten with regrouping.
This lesson teaches how to subtract 1-digit numbers from multiples of ten with regrouping. Practice free: http://www.ilearn.com/subtract
This playlist teaches how to subtract numbers from two digits through 4 digits. The make a ten strategy covered in the Addition and Subtraction playlist is used in these lessons to teach regrouping. http://www.ilearn.com/subtract
The playlist is organized so that students progress from the simplest cases with the smallest number of digits and no regrouping to the more difficult cases with 4-digit numbers and regrouping in more than one place.
iLearn provides professionally designed math instruction for all markets, including home, K-12, and college. Our instructional programs combine the best scientifically-designed curriculum with state-of-the art delivery systems.
Our specialty is providing easy-to-use, highly effective support, for students who have difficulty learning math. It’s the easiest and fastest way to understand math and master math procedures.
This video is one of over 800 lessons from iLearn on math topics ranging from kindergarten through high school math.
• Subscribe to our channel and have access to all of our lessons here on YouTube.
• Share this video with your friends via your favorite social site.
For free access to unlimited online practice and tests, along with free access to these lessons, go to:
http://www.ilearn.com/subtract
For more information, contact us at:
http://www.ilearn.com
1-877-789-2088 ext. 128 (toll free)
If you prefer to read, rather than watch this video, here’s the transcript:
Title: Learn to subtract 1-digit numbers from multiples of ten with regrouping.
You can already subtract a one-digit number from 10 and 20.
In this lesson, you'll learn how to subtract a 1-digit number from other numbers made up of tens.
Here's an example. 40 minus 2.
Forty is 4 tens.
We start subtracting in the ones place.
We can't subtract 2 from 0, so we have to take a ten from 40 to make ten ones.
We cross out the 4 in 40 to show we took a ten and we enter a 3 here to show we have 3 tens left in the tens place, which is 30.
We put a 1 here to show that we made ten ones.
Now we subtract 2 from the 10 ones.
10 minus 2 is 8.
In the tens place, there's nothing to subtract, so we bring down the 3.
That gives us 38.
So 40 minus 2 is 38.
Another example. 60 minus 7.
Sixty is 6 tens.
We start subtracting in the ones place.
We can't subtract 7 from 0, so we have to take a ten from 60 to make ten ones.
We cross out the 6 in 60 to show we took a ten and write a 5 above it to show there are 5 tens left, which is 50.
We show that we made ten ones by putting a 1 here.
Now we subtract 7 from the 10 ones.
10 minus 7 is 3.
There's nothing to subtract in the tens place, so we bring down the 5 we have left.
That gives us 53.
So 60 minus 7 is 53.
Last example. 80 minus 4.
We start with the ones place.
We can't subtract 4 from 0, so we have to take a ten from 80 to make ten ones.
We cross out the 8 in 80 to show that we took a ten.
And we write 7 here to show there are 7 tens left, which is 70.
We put a 1 here to show that we made ten ones.
Now we subtract 4 from 10.
10 minus 4 is 6.
There's nothing to subtract in the tens place, so we bring down the 7 we have left.
That gives us 76.
So 80 minus 4 is 76.
In the rest of this lesson, you'll work problems like these. You can use these boxes if you want, but you don’t have to.
http://www.ilearn.com/subtract
https://youtu.be/eUedoQjX5MY
