Arithmetic Grade Four

Lesson Nineteen: Division Review

Remember that we can draw pictures of word story problems. Think about this sample word story problem: 

   There are 42 fish in a big tank.
   These fish are moved to 6 smaller tanks.
   How many will there be in each smaller tank?
We could represent this story problem with six rows of x's like this: 
   
      xxxxxxx
      xxxxxxx
      xxxxxxx
      xxxxxxx
      xxxxxxx
      xxxxxxx
We make six rows and we add an x to each row until we reach a total of 42 x's. Then we count the number of x's in each row. We wind up with 7 x's in each row. 

     42 / 6 = 7

Here's another example: 


   There are 32 pancakes on a large grill.
   An equal number of these pancakes will
   be placed on each of 8 plates.
   How many pancakes will be on each plate?
We could represent this story problem with 8 rows x's like this: 

      xxxx
      xxxx
      xxxx
      xxxx
      xxxx
      xxxx
      xxxx
      xxxx
We make 8 rows of x's and keep adding x's to each row until we reach a total of 32 x's. 

    32 / 8 = 4

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