Asked by CHAYO
                What models can be used to help explain the concepts of addition and subtraction of rational numbers? What are the benefits to using such a model? What limitations does the model have? Create an addition or subtraction problem and demonstrate how the model might work. 
            
            
        Answers
                    Answered by
            Anonymous
            
    Cutting a pie into equal slices so you can add or subtract them.
EXAMPLE: 1/4 + 1/2 = 3/4. To get the half slice to equal the size of the quarter slice, you need to cut it in half. Then the half slice becomes two quarter slices. When you add all of the quarter slices together, you have three of them: the original quarter slice, plus two more from cutting the half slice in half to get two more quarter slices that you could add with the original to get a total of 3 quarters, or 3/4.
    
EXAMPLE: 1/4 + 1/2 = 3/4. To get the half slice to equal the size of the quarter slice, you need to cut it in half. Then the half slice becomes two quarter slices. When you add all of the quarter slices together, you have three of them: the original quarter slice, plus two more from cutting the half slice in half to get two more quarter slices that you could add with the original to get a total of 3 quarters, or 3/4.
                    Answered by
            Anonymous
            
    (and for whole numbers, you can think of them as representing entire pies, so when you add or subtract them, no slicing is necessary.)
    
                    Answered by
            CHAYO
            
    CAN YOU PLEASE EXPLAIN EACH QUESTION I'M A LITTLE CONFUSED I'M STUDYING FOR MY MID TERM THAT i'M GOING TO HAVE IN TWO WEEKS. THANKS
    
                    Answered by
            bobpursley
            
      Why don't you explain what you think it means, and let us critique that?   We have no idea what you don't understand, the questions to me are straightforward.
    
                    Answered by
            CHAYO
            
    Oh I get it now thanks I was a little confused.
    
                    Answered by
            Anonymous
            
    This is not for a mid term, this is a discussion question for a class, I'm taking it too!
    
                    Answered by
            Anonymous
            
    What models can be used to help explain the concepts of addition and subtraction of rational numbers? What are the benefits to using such a model? What limitations does the model have? Create an addition or subtraction problem and demonstrate how the model might work. 
    
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