Verified Answer :

emmagm1231

lets say that you have 4-2=? you can use a bar model.... 

 {the stars are the bars}
 you have 4 total and now you need to subtract 2
**
{ i just took away 2 and then you count the bars but in this model count the stars}


Hope this helps!!! 

andrea51005

It can be used because it shows how many of something you took away .

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