Subtraction with Regrouping
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# Subtraction with Regrouping

Curated by Alexis
 Scooped by Alexis

Our 2nd graders are thinking mathematically to solve subtraction problems that would normally require "borrowing." http://t.co/hNK0h9D1yL
Alexis's insight:

Once again, this shows an alternative strategy than simply just "borrowing" in a subtraction with regrouping problem. I love that students are able to think outside of the box and I think that our job as teachers is to tell them that there is no right way to solve the problem. There are many different ways. As a teacher, I will be sure to introduce different strategies.

Alexis's curator insight,

I scoopped this on both of my boards because I also think that this shows promoting a mathematical community. As teachers we should promote our students' thinking and give them the opportunity to show us how they would solve the problem. Every student is different and we need to provide a community where they feel comfortable.

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## Subtraction Strategies with Regrouping

Here are some strategies for double digit subtraction where you need to regroup (borrow). There are many variations of these strategies, so choose one that m...
Alexis's insight:

This is great! While working with my students, I found that many of them approached subtraction with regrouping in different ways. This really gives me different strategies to help my students. I also love that this teacher is doing this to show her parents the different strategies they do in class. This is also an example of promoting a mathematical community. I would love to do something like this for my parents.

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## BrainPOP Jr. | Math | Learn about Subtracting With Regrouping

Provides educational movies for K-3 students. Homework Help, leveled quizzes, games and activities for kids. Exceptional resource for teachers and homeschools.

Via Samantha Hines
Alexis's insight:

I have heard great things about Brain Pop. I think that my students would really enjoy this and it gives them a break from regular math lessons. They can play games, take quizzes, and more while exercising thier brains and practicing math (specifically subtraction with regrouping).

Samantha Hines's curator insight,

My mentor and I have used BrainPop videos many times in our classroom before, and the students love it. They are really familiar with the characters in the videos and how the website works, which would encourage them to view this video as valuable as well. This video about subtraction with regrouping puts the concept into real world problems: playing a board game and losing points, selling tickets, a store selling robot toys, etc. Because the video introduces the concept in many different contexts, great discussion could be facilitated because students are presented with various ways to access the information. This video explains how to trade ones cubes for a tens block and vice versa, and also shows the blocks moving around to help students visualize this concept of trading. This is beneficial because students can then model this and go and practice with tens blocks on their own, or teachers can refer back to this video when modeling how to use tens blocks. The video also explains why you have to regroup, which I think is a missing part of many lessons on subtraction with regrouping. The narration walks students through each step of the process (several times in different contexts) by drawing on the equation and talking through every part. Therefore, it could be used for independent computer time before releasing them to another online task. If a teacher was using this with the whole class, they could pause the video at certain times to discuss and focus on where students are really having trouble. Lastly, the part of the video that I think makes it stand apart from other online resources is the section at the end where it talks about using addition to check your answer. This is a great extension and allows students to conceptualize subtraction in a different way. They can see how addition and subtraction relate while also learning a strategy to double-check their work.

Laura Jane's curator insight,

I have heard a lot of praise for BrainPOP, but it isn't a resource that my mentor teacher utilizes. This video shows subtraction in a real world context: losing points in a board game, selling tickets, a store selling toys, etc. By making these connections to things that students of this generation have actually encountered, it makes the math more meaningful and significant.

Teachers frequently teach the algorithm for a math skill, without explaining WHY it makes sense. This video also uses virtual manipulatives to model regrouping for students. This aspect makes the video very versatile... It could be shown to the whole group, or it could be used for independent computer work in small math rotation groups.

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## Teaching Blog Addict: Free Math Regrouping Poster!

Alexis's insight:

This is a fun song/poem to introduce students to regrouping and to get them familiar with the idea of it. Students could even make it their own by adding their own rhythm to it. It gets them thinking and ensures that they know when to regroup.This is just something fun that I would tell my kids when starting subtraction with regrouping.

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## Subtraction-with-Regrouping-Article1.pdf

Alexis's insight:

I absolutely love these strategies for teaching subtraction with regrouping! I really enforced these with my students as we worked on subtraction with regrouping in our student impact project group. I love the reinforce place value concepts. In order to regroup, students need to have this basic understanding of place value. So many great tips for teaching subtraction with regrouping that I will definitely use (especially have students "become" a math problem). I love that this article sums up the tips and gives examples. I would love to read the actual, full article.

Samantha Hines's curator insight,

This .pdf gives teachers great strategies to help their students overcome the obstacle of subtracting with regrouping. While students need their own resources to help them, teachers do as well. This file lists and explains things that teachers should focus on and how to make the concepts more accessible and meaningful for their students. These strategies can help students build conceptual understanding of subtracting and mastery of the skills involved so that they can be applied to other contexts. Something I particularly like about these tips is that they can be useful for any grade - I think that sometimes, getting back to the basics can be more beneficial for older students who may feel the pressure of higher expectations. I also think that the first tip is really important: start with number sense. By starting with what subtraction means (introducing concepts like separate, whole-part-whole, and compare) students can get a baseline understanding of how to apply these concepts to subtraction problems. This will also benefit them later when they learn about more complex subtraction, like how to subtract fractions. Fact families are a great way to get students to see the relation between subtraction and addition. The students in my classroom loved working with these, and are still applying the skills they learned from fact families to other topics. I also agree with the statement, “Money is motivating”. Money is a great way to connect math concepts to meaningful, real-life situations. Money also lends itself to many possibilities when talking about subtraction with regrouping.

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## How Do you Teach Regrouping with Understanding? | Teacher Blog ...

If kids aren't building with base ten blocks to add and problem solve FOR WEEKS initially, they will get no where with their number sense understanding for regrouping. Under common core standards, we are heading towards ...
Alexis's insight:

This is a great new way to teach regrouping to students who don't understand. This will give meaning to regrouping and students will be able to understand in a way other than using manipulatives. Its an alternative and I agree that base ten blocks need to be used initially to build number sense to help with regrouping.

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