Mary is baking a cake. The recipe calls for 1 cups of sugar and 50 cups of flour. She already put in 2 cups of flour. How many more cups of flour than cups of sugar does she need to add now?
1. Mary is baking a cake. The recipe calls for 1 cups of sugar and 50 cups of flour. She already put in 2 cups of flour. How many more cups of flour than cups of sugar does she need to add now?
2. The recipe calls for 1 cups of sugar and 50 cups of flour. She already put in 2 cups of flour. 
3. She already put in 2 cups of flour. 

So, she needs to add 48 more cups of flour.