During the mini-lessons, I begin teaching the split strategy of addition by first making it concrete by using base ten blocks. I started with two-digit numbers to make it a bit easier. Either way, we discuss the vocabulary and review any previous related words. That’s one way to view it. Just use the ones that would be helpful for your students, either in the classroom as buddy work or as homework to play with a sibling or parent. All of the workshop lessons are in the I do, we do, you do format. Teaching point 1: Addition is commutative: when the order of the addends is changed, the sum remains the same. Learning different strategies helps empower them to choose what works for them at that moment. I actually think that using negatives is the easiest for my students to do because it doesn’t require that they know higher subtraction facts (like 15-7). We are now into our subtraction with regrouping unit this week. I like to start with simple subtraction stories as a way to introduce subtraction. Don’t feel the need to teach every strategy or play every game. Filed Under: Math Tagged With: subtraction strategies. I have always collected my vocabulary terms from two different websites. Notify me of follow-up comments by email. The problems move from simple (subtracting 10s) to complex (regrouping) while practicing four main strategies: Use a Number Line, Use Base-10 Blocks, Break Apart or Ungroup, Subtracting with … Transitioning to the Formal Algorithm:. Compensation: Compensation is one of my favorite subtraction strategies, because once students know how to compensate, they can begin using it in many different math situations. For the active engagement, during the days we spend on the split strategy for subtraction, students continue practicing the strategies by first using the base ten blocks and then working into drawings and eventually the abstract. Teaching 2-3 digit subtraction strategies is one of the most difficult skills to teach! When students have grasped the split strategy, then it is time to move on to the jump strategy and the shortcut strategy. Finally, at the end of math workshop, we gather back together for a quick closing that is related to the lesson. After addition, we dive right into subtraction and learn how the two are related. Then, I pull out 4 tens and 3 ones. The present volume – Volume 2: Addition and Subtraction – provides: • a discussion of mathematical models and instructional strategies that support student understanding of addition and subtraction; • sample learning activities dealing with addition and subtraction for Grades 4, … (You can read about this model of gradual release in math with my Teaching Math So Students Get It post.). This math strategies resource is packed with everything you need to teach subtraction strategies up to 20! We did a lot of role playing out simple subtraction problems by having students come up to the front of the room. Teaching Addition and Subtraction Strategies. With subtraction, there’s two ways to think about subtraction. I also move away from blocks altogether and just use numbers in expanded form. Teaching points. Seriously, it can be SO tricky, but today I want to share with you 4 2-3 digit subtraction strategies that will help your students develop a deeper understanding of subtraction. The general thought here is that teaching lots of concrete activities that are first modeled then practiced will help your students grasp both addition and subtraction strategies faster and with better retention. They only need to know the facts from 1-9 and know that if the first number is larger it’s “plus x” or if the first number is smaller, it’s “minus x”. See more ideas about teaching subtraction, kindergarten math, subtraction. Equip children with a range of useful strategies for addition within ten, including adding and subtracting zero and one, commutativity, adding and subtracting two to/from odd and even numbers, and doubling and halving. I wrote recently about understanding the addition and subtraction strategies, and today I wanted to share with you just how I teach them in my classroom using the math workshop model. Eventually over the days, I move into three-digit numbers and semi-concrete lessons by drawing the blocks out rather than using actual blocks. As you teach your students each method, give them the freedom to pick and choose the method that works best for them. Sometimes if I feel my class is lacking in some terminology, I’ll also add them to the list. So, I first begin with a mini-lesson where I gather my students around an easel with their notebooks in hand so they can take notes. They’ve been much more accurate with this method. Then, I demonstrate that I’m going to add all the ones, so 6 ones plus 3 ones gives me 9 ones. Want more valuable teaching tips and other ah-mazing perks, such as discounts, giveaways, flash freebies, dollar deals, and so much more? First I collect them from common core, found here: http://www.corestandards.org/Math/Content/mathematics-glossary/glossary/ and from this one: http://www.ncesd.org/Page/983. When Common Core stated that we needed to teach addition and subtraction strategies based on place value, properties of operations, and/or the relationship between addition and subtraction, I will admit I was at a loss for a long time. The Owl Teacher | Privacy page | Disclosure Page, This website uses cookies to ensure you get the best experience on our website. Drawing a simple picture (diagram) is also another strategy students could … Once they finish the activity or game, I have them work on an independent practice sheet (so I can determine if they are grasping it okay or need more help!). I pull out base ten blocks creating 86 with 8 tens and 6 ones. Since this lesson requires me to demonstrate using blocks, I had my students stay where they were and used the doc cam. , COPYRIGHT © 2016-2021. So again, there is no best way we should be teaching subtraction. This is a great way for me to quickly review place value with students as I model each addend. (Which is for you to download for FREE below.). Clearly, they are going bananas for the split strategy! Addition and subtraction strategies are one of my favorite things to teach. So, I first begin with a mini-lesson whe… how knowing 10 – 8 could help you solve 40 – 8. Draw a Picture! Ways to solve multi-digit addition problems. Teaching a range of subtraction strategies is important if we want kids to have mastery over the subtraction facts to 20. Use part-whole models and ten-frames to investigate numbers up to 80. I write this down on a sticky pad that I carry around in my hand. Your email address will not be published. I introduce each […] Represent and solve simple addition and subtraction problems using a range of strategies including counting on, partitioning and rearranging parts In Mathematics Year 1 Number and Algebra Number and place value ACMNA054 Recognise and explain the connection between addition and subtraction Observation is an amazing assessment! This is where students work on the lesson while I work in small groups or confer. To start with simple subtraction stories are studying this addition strategy mastery the. Lesson with a few extra problems practicing the split strategy of addition by first making it concrete by base. 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