How can u tell that 647 is less than 674?

I can tell because in 647, 4 is in the tens place. In 674, 7 is in the tens place. That tells me right away that 674 is bigger. Look at the hundreds place first, then move to the tens. 7 is bigger than 4.
~Deceptiøn

You can use a calculater and divide the minutes by the $$, hope that you