Question

How do you know

the quotient of 639 /
6 is greater than
100 before you actually divide

Answer 1

You just need a little conversion to get the answer.

`(639)/(6)=(600)/(6)+(39)/(6)\\ = 100+(39)/(6) >100`

Answer 2

because since the question is 639 / 6

we immediately know that 600 / 6 is 100

639 / 6 = 106.5