Week 18 CMT Style Problem - 4th Grade

The Vending Machine

Carlos wants to buy a 75-cent snack from a vending machine. The machine accepts only nickels, dimes, and quarters. Carlos has 7 nickels, 5 dimes, and 2 quarters.

1. What are all the possible ways that Carlos could pay for the snack? You may use words or pictures.
   
   
   
   
   
   
   
   
   
2. Which of your ways would use the fewest number of coins? Explain why this is so.
   
   
   
   
   
   
3. Which way would use the greatest number of coins?