Cindy says she found a shortcut for doing multipication problems .when she multiplies 3 times 24 ,she says, 3 times 4 is 12 ones ,or 1ten and 2 ones . then there's just 2 tens left in 24, so add it up and you get 3 tens and 2 0nes ." do you think cindy's shortcut works ? explain your thinking in words to justify your response using a model or partial prouducts.