Subtraction with Regrouping
This is the lesson on how to subtract numbers where the students have to regroup or borrow. There is a method that a colleague of mine came up with that works well for regrouping with zeros. It includes a rap that the students really like to perform and can help them talk through the process of regrouping. Just push the play button to start the video of the lesson. There is also a link to some practice problems involving regrouping and some word problems applying the skill at the bottom of the page with an answer key following.
Subtraction Rap
(By Johnna Perez)
I go next door to borrow,
but he doesn't have any
So I slide on over to a number with plenty,
and I box it.
Then I take one away.
I move the one over,
and the other number stays!
Word!
but he doesn't have any
So I slide on over to a number with plenty,
and I box it.
Then I take one away.
I move the one over,
and the other number stays!
Word!
Practice Problems
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Sample Word Problems:
1. At a baseball game, 7,895 people are cheering for the home team. If there are 12,956 people in the stands, how many people are cheering for the visiting team?
2. On Friday, 9,500 people went to visit Ellis Island. On Saturday, 8,270 people went to visit Ellis Island. How many more people visited Ellis Island on Friday than on Saturday?
3. There are 5,000 students in the county. If 2,768 of them are boys, how many of the students are girls?
4. Jamie took a twenty dollar bill to the toy store. She wants to buy a game for $15.95. How much change will she get back if she buys the game?
5. The grocery store has 6,078 bags of licorice. If 3,988 of the bags are red licorice, how many of the bags are black licorice?
1. At a baseball game, 7,895 people are cheering for the home team. If there are 12,956 people in the stands, how many people are cheering for the visiting team?
2. On Friday, 9,500 people went to visit Ellis Island. On Saturday, 8,270 people went to visit Ellis Island. How many more people visited Ellis Island on Friday than on Saturday?
3. There are 5,000 students in the county. If 2,768 of them are boys, how many of the students are girls?
4. Jamie took a twenty dollar bill to the toy store. She wants to buy a game for $15.95. How much change will she get back if she buys the game?
5. The grocery store has 6,078 bags of licorice. If 3,988 of the bags are red licorice, how many of the bags are black licorice?
Check Your Work!
| answerkeysubtractionwithregrouping.doc |
