I plan to bring ice cream and chocolate syrup to a picnic to make ice cream sundaes.  If a container of ice cream can make 6 sundaes and a container of chocolate syrup makes 9 sundaes, how many of each do I need?   I do not want any leftovers, because we will be at a park with no refrigerator.  How many sundaes can I make?   
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For 4th and 5th grades:  If I want to add whipped cream to my sundaes and a container of whipped cream can make 4 sundaes, how many of each do I need now?  How many sundaes can I make?