Week 13 CMT Style Problem - 5th 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? List all the ways in a chart.
   
   
   
   
   
   
   
   
   
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?