Elizabeth bought 6 packages of cat food and 3 packages of dog food. Each package of cat food contained 9 cans, and each package of dog food contained 4 cans. How many more cans of cat food than dog food did Elizabeth buy?
she bought 42 more cans of cat food becuase 6 packages with 9 cans is 6 times 9 and that is 54 -42 to equal 12 because 3 times 4 which is how much dog food she buys
