Step-by-step explanation: carl has 56 marbles so what you have to do is divide 56 by 7 since he has 7 times as many than bil so that will give you 8 marbles *to check multiply 7 with 8*
I believe A and B are the ones. As for explaining? hmm. I would honestly say that any number to the right of a number is a tenth of the place above it. But then again, it's optional to explain ;P
