a dime is 10 cents
a penny is 1 cent
a nickel is 5 cents
if you have 3 dimes, then you have 10 cents + 10 cents + 10 cents,
an easier way to write this is 3 x 10 cents which equals 30 cents
then, add 1 penny which is 1 x 6 which equals 6, so now you have 36 cents
then, add your one nickel which is 1 x 5 which equals 5, then add that to your total to get 41 cents