How many coins?
This task is about working out how many coins make up a given amount of money.
a) 
Terri has some 50 cent and 20 cent coins in her piggybank. They have the same number of each coin, and no other coins.
If the coins are worth a total of $3.50, how many of each coin do they have? __________


b) 
Chloe has $1.80 worth of 10 cent and 20 cent coins. She has the same number of 10 and 20 cent coins, and no other coins.
How many coins does she have altogether? __________


