## How Can You Add and Subtract Numbers?

Posted by: Sriyu in Math, tags: 4 terry, Grade 4, is bangkok, isb, isbg4_222, math investigations, metacognition, states of mind**How Can We Achieve Our Potential As Mathematicians?**

We are currently working on the last part of our **Unit 5 math unit, Landmarks and Large Numbers**. Over the last few weeks, we’ve been working hard on challenging ourselves as mathematicians and showing everything we know. We’ve used the **five states of mind**, **craftsmanship, flexibility, interdependence, efficacy and consciousness**, to push our thinking and help us grow as learners.

## Here are some questions you can ask yourself to help you be more aware of how you’re doing as a learner (**Consciousness**):

### *How can I use the **‘I can’ statements** to **improve my learning**?

### *How can I use **assessments** to **build on my learning?**

### *Am I **aware** of **what I need to learn**?

### *How can I make my **strategies more efficient**?

### *What are my **strengths** and **areas of need**?

** Remember, Good Mathematicians:**

**(Craftsmanship, Flexibility, Efficacy)**

### ***Estimate** before they solve a problem

### *Use the **problem solving process**

### *Use **multiple strategies**

### *Use **efficient strategies**

### *Use **words, numbers and pictures** to explain their thinking

### ***Check** their solution is **reasonable**

Over the last few weeks, we’ve been working on adding to our **addition and subtraction strategies**. We’re developing our strategies so that we can use **at least two efficient strategies** for both **addition and subtraction**. The short algorithm can be used, but only as an additional strategy (after using two other strategies) or as a strategy for checking our work.

### Here are some charts to help you review the big ideas of the unit, as well as **strategies for addition and subtraction**:

Created with Admarket’s flickrSLiDR.

Tomorrow we will send home the **Unit 5 pre-assessment** and **‘I can’ statements** to help you review at home. We’ll be continuing to work on these problems and ideas at school, so please bring the papers back to school each day.