סרט ואנימציה

בית
מאמרים

Subtraction: Learn to subtract 1-digit numbers from twenty with regrouping. Teacherflix 4 צפיות • לִפנֵי 2 שנים

This lesson teaches how to subtract 1-digit numbers from twenty 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 twenty with regrouping.

You can already subtract a one-digit number from ten.
In this lesson, you'll learn how to subtract a 1-digit number from 20, which is 2 tens.
Here's an example. 20 minus 3.
Twenty is 2 tens.
We start subtracting in the ones place.
We can't subtract 3 from 0, so we have to take a ten from 20 to make ten ones.
We cross out the 2 in 20 to show we took a ten and we put a 1 here to show we have 1 ten left in the tens place.
We put a 1 here to show that we made ten ones.
Now we subtract 3 from the 10 ones.
10 minus 3 is 7.
In the tens place there's nothing to subtract, so we bring down the 1.
That gives us 17.
So 20 minus 3 is 17.
Another example. 20 minus 8.
Twenty is 2 tens.
We start subtracting in the ones place.
We can't subtract 8 from 0, so we have to take a ten from 20 to make ten ones.
We cross out the 2 in 20 to show we took a ten and we write a 1 above it to show we have one ten left.
We show that we made ten ones by putting a 1 here.
Now we subtract 8 from the 10 ones.
10 minus 8 is 2.
There's nothing to subtract in the tens place, so we bring down the 1 we have left.
That gives us 12.
So 20 minus 8 is 12.
Last example. 20 minus 4.
We start with the ones place.
We can't subtract 4 from 0, so we have to take a ten from 20 to make ten ones.
We cross out the 2 in 20 to show we took a ten.
And we write 1 here to show there is 1 ten left, which is 10.
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 1 we have left.
That gives us 16.
So 20 minus 4 is 16.
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/Y9WhHCgtE5g

Make a ten strategy Subtraction Facts: 9 and missing addend described with symbols Teacherflix 8 צפיות • לִפנֵי 2 שנים

Learn subtraction facts with the make-a-ten strategy: subtracting 9, part 3. Free practice at http://[a]www.ilearn.com%2Ffacts[/a]

iLearn provides the easiest and quickest way to learn the make-a-ten strategy that works for all addition and subtraction facts with sums or minuends greater than 10. Without this strategy, these are the hardest facts to learn. With this strategy, they become very easy. Because the strategy is based on the fundamental principle of place value, students have far less difficulty understanding place value later when they learn to add and subtract numbers with 2 or more digits.

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 similar 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://[a]www.ilearn.com%2Ffacts[/a]

For more information, contact us at: 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: Make a ten strategy Subtraction Facts: 9 and missing addend described with symbols

In this lesson, we'll answer questions like this. 9 plus what number equals 13?
To find the number we need, we start with the number we know, so we start with 9.
We need one more here to make 10 so we click here to add it.
Now we have 10 and we need 13 in all.
13 is 3 more than 10 so we add 3 more here.
1 and 3 is 4 so we added 4 more in all.
10 and 3 makes 13 so 9 and 4 also makes 13.
13 is 4 more than 9 so we put 4 in the answer box.
9 plus what number equals 17?
To find the number we need, we start with the number we know, so we start with 9.
We need one more here to make 10 so we click here to add it.
Now we have 10 and we need 17 in all.
17 is 7 more than 10 so we add 7 more here.
1 and 7 is 8 so we added 8 more in all.
10 and 7 makes 17 so 9 and 8 also makes 17.
8 is the number we add to 9 to get 17 sSo we put 6 in the answer box.
Now you do some on your own.
Click on a number strip here to put more blocks here.

http://[a]www.ilearn.com%2Ffacts[/a]

https://youtu.be/E65BTcJaqJs

Showing 158 out of 159

שים לב שאם אתה מתחת לגיל 18, לא תוכל לגשת לאתר זה.

סרט ואנימציה

שפה