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Posts Tagged ‘exchange’

Using the Recorder on the Slate

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Examples of us working out our Same Value Exchange Problems.

Same Value Exchange

Here is an example of the “Same Value” Exchange Math Strategy that we have been working on this week.   It is a way to add or subtract  3 and 4 digit numbers.   I will record the steps tomorrow for a better example, but for today here is an image for you to look at. Step 1: Say the top NUMBER Step 2: Write it out in Expanded Form Step 3: Say the bottom NUMBER Step 4: Write it out in Expanded Form Step 5:   You can start adding with any collumn, the hundreds, tens or ones…(make sure to break them apart) Step 6:   Circle the numbers that are alike (we say live in same house and family) tens, ones, ect. Step 7: Add up and write the correct number in STANDARD FORM This seems like a lot of steps, but if the kids can actually do this, they will RESPECT THE DECIMAL and have a better understanding of numbers which will help them in the upper grades! YOU will thank me later!   I learned the good ol’ Carrying and Borrowing way myself, it is a hard transition, but it totally makes sense and the children will get the RIGHT answer and know why they did when using this STRATEGY! We will post more examples soon!!!

  I had the kids COLOR CODE the steps!   I think it really helped them.   Here are a couple of examples that we did in class!   I was SO excited for them!  

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