In one day, 18 people each withdrew $100 from an ATM machine. What is the overall change in the amount of money in the ATM machine?

Question

Can some body help me i know his question might be easy for some of you.

Answer 1

Let M = amount of money in ATM at the beginning

 

M - 18(100) = M - 1800

 

The change is a decrease of $1,800

Answer 2

Imagine a line of 18 people at the machine.

Each one withdraws $100.

So $100 gets withdrawn 18 time.

 

How much is that?