Lonnie has a large supply of quarters, dimes, nickels, and pennies. In
how many ways could she make change for 50 cents?
You can make a systematic list for this one (four columns, with how many
quarters, dimes, nickels and pennies for all the ways to make change for
50 cents), but it's going to be a long list! Can you think of ways
to count all the ways without making the complete list?
As always, be sure to explain the
work you did to arrive
at your answers!